Most Pokémon emulation guides point you toward melonDS, DeSmuME, or mGBA, and for good reason: those projects ship frequent updates and handle modern hardware well. No$GBA (short for NO-CASH GBA) rarely gets the same attention, yet Martin Korth’s emulator and debugger is still the fastest way to boot a Game Boy Advance Pokémon ROM on a decade-old laptop, and it is one of the only tools that lets ROM hackers watch memory addresses change in real time while a battle plays out on screen. This guide walks through installing No$GBA version 3.06, configuring it for Pokémon FireRed, LeafGreen, Ruby, Sapphire, and Emerald, loading Nintendo DS titles like Platinum and HeartGold, and turning on the built-in debugger for ROM hacking work, in 13 steps.
We will also cover where No$GBA falls short. Its Nintendo DS wireless implementation is incomplete, so if your goal is trading or battling Pokémon between two emulator windows, you will be pointed toward a better-suited tool partway through this guide rather than left to fight a feature that was never finished.
What Is No$GBA, and Why It Still Matters in 2026
No$GBA is a Windows and DOS emulator for the Game Boy Advance, Nintendo DS, and DSi, built by German developer Martin Korth under the nocash label. Korth has maintained the project since the early 2000s, and unlike most modern emulators it was never rewritten as an open-source community effort. The current build, version 3.06, was published in April 2025 on Korth’s own site, problemkaputt.de, and on the GBATek hardware documentation hub where the tool is still listed as an active GBA/NDS/DSi emulator and debugger for Windows.
The reason No$GBA has not disappeared is that it does two jobs other emulators split apart. First, it runs GBA software with a small, dependency-free executable that starts in under a second on almost any PC, including machines that choke on heavier RetroArch cores. Second, it ships a debug build with a register-level tracer, breakpoints, and a live memory viewer, which is exactly what ROM hackers reach for when they need to confirm that a modified Pokémon FireRed script is writing the right value to the right address. Few casual-gaming emulators bother with that layer at all.
That combination makes No$GBA a reasonable pick for three groups: players who want a lightweight way to run GBA-era Pokémon games, ROM hack developers who need a debugger alongside their emulator, and anyone curious about DS-era internals who wants to poke around under the hood. It is a weaker pick for players whose main goal is linking two DS Pokémon games over local wireless, and this guide says so plainly rather than pretending otherwise.
A Brief History of No$GBA and the nocash Project
No$GBA grew out of Korth’s broader nocash documentation effort, which also produced GBATek and NDSTek, two of the most frequently cited low-level hardware reference documents in the entire emulation scene. Those documents describe GBA and Nintendo DS hardware registers, memory maps, and timing behavior in enough detail that other emulator projects, including melonDS and DeSmuME, cite them directly in their own source code comments. The GBATek tools listing for No$GBA still describes it as “a Gameboy Advance / NDS / DSi emulator & debugger for Windows,” language that has barely changed in years because the tool’s scope has not changed much either.
That history explains why No$GBA feels different from almost everything else covered on this site. Open-source projects like melonDS and DeSmuME grew through pull requests from dozens of contributors chasing broader compatibility and modern conveniences like shader support or save-state slots synced to cloud storage. No$GBA stayed a one-developer tool aimed first at documenting hardware accurately and second at running games. That priority order is exactly backward from what most players want, but it is exactly right for the ROM-hacking audience this guide treats as a second, equally important reader alongside casual players.
Prerequisites: What You Need Before You Start
No$GBA has modest requirements compared to Dolphin or RPCS3, but a few items need to be in place before step one.
- Operating system: Windows 10 or Windows 11 for the native build. Linux and macOS users run the Windows executable through Wine or a compatibility layer such as CrossOver, since there is no native Linux or Mac build.
- No$GBA version 3.06 (released April 2025), downloaded as either the gaming build (roughly 210 KB) or the debug build (roughly 1.5 MB). Get it from problemkaputt.de, Korth’s own site, or the GBATek tools index, not from a repackaged “portable” mirror.
- A legally dumped ROM file of the Pokémon game you own, in .gba or .nds format. This guide does not link to ROM download sites.
- Your own hardware’s BIOS/firmware dump if you want full Nintendo DS compatibility. No$GBA’s GBA mode boots most commercial ROMs without a separate BIOS file, but DS firmware improves compatibility on some titles.
- A keyboard, or a USB/Bluetooth game-pad recognized by Windows, for control mapping in steps 7 through 9.
- At least 50 MB of free disk space for the emulator, save files, and save states. This is not a typo; No$GBA is tiny.
If your only goal is playing GBA Pokémon games with the least setup friction, our mGBA setup guide for Pokémon GBA games is worth comparing against this one before you commit. No$GBA earns its place when you specifically want the debugger or the smallest possible footprint, not simply “an emulator that works.”
No$GBA vs melonDS vs DeSmuME vs mGBA: Where It Fits
Before installing anything, it helps to see where No$GBA sits next to the other emulators this site has already covered in depth. The table below compares the four tools most Pokémon players consider for GBA and DS-era games in late 2026.
| Emulator | Latest version | Platforms emulated | DS local wireless | License | Best for |
|---|---|---|---|---|---|
| No$GBA | 3.06 (April 2025) | GBA, NDS, DSi | Partial, unreliable | Freeware, closed source | GBA speed, built-in debugger |
| melonDS | 1.1 (Nov. 18, 2025) | NDS, DSi | Working, documented | Open source (GPLv3) | DS local wireless trading/battling |
| DeSmuME | 0.9.13 (May 2022) | NDS | Limited | Open source (GPLv2/v3) | Long-standing DS compatibility baseline |
| mGBA | 0.10.5 (March 8, 2025) | GB, GBC, GBA | Not applicable (no DS) | Open source (MPL 2.0) | GBA accuracy and ROM-hack testing |
| DraStic | r2.6.0.4a (April 2024) | NDS (Android) | Incomplete | Freeware, removed from Google Play Feb. 2025 | Legacy Android installs only |
Two things stand out. melonDS is the only project in this group with genuinely working local wireless between two DS instances, which it uses to support Pokémon-style link trading and battling; it has shipped two stable releases since mid-2025 and nightly builds kept landing as recently as August 2026. No$GBA, by contrast, documented parts of the DS wireless stack years ago but connections commonly stall before a session is fully established, a limitation that has not changed in the current 3.06 build. If local trading is your actual goal, read our guide on how to trade Pokémon between two emulator instances instead of trying to force it through No$GBA.
For reference, the official homes of the three open-source alternatives in that table are melonDS’s project site, DeSmuME’s official download page, and mGBA’s official site. Bookmarking those pages directly, rather than trusting a third-party download aggregator, is good practice for any emulator on this list, No$GBA included.
How No$GBA Handles Pokémon ROM Hack Compatibility
ROM hacking is where No$GBA earns most of its remaining relevance, so it is worth being specific about what that means in practice. Community-maintained ROM hack indexes list popular Pokémon GBA hacks such as Radical Red, Unbound, Gaia, and Emerald Kaizo as generally bootable in No$GBA’s GBA mode, the same titles that run on mGBA, currently at stable version 0.10.5 from March 2025. For straightforward hacks that only change text, maps, or encounter tables, No$GBA and mGBA should behave almost identically, since both emulate the same Game Boy Advance hardware and neither needs a separate BIOS file for ordinary ROMs.
Where the two diverge is timing-sensitive code, the kind found in hacks that add new battle mechanics, custom scripts firing on specific frame counts, or non-standard save routines. mGBA is widely treated as the current accuracy reference for GBA emulation, in part because of its own automated test suite and active bug-tracking process. No$GBA has no comparable public test suite, so a hack that behaves oddly in No$GBA but fine in mGBA is more likely a No$GBA timing quirk than a bug in the hack itself, and the reverse is rarely true. For day-to-day play of a finished, popular hack, this distinction rarely matters. For hack developers debugging their own in-progress project, it is a reason to keep both emulators installed side by side: write and debug in No$GBA for the memory tools, then spot-check the final build in mGBA before release to catch timing issues No$GBA’s debugger will not flag on its own.
Nintendo DS ROM hacks are a rougher story across every emulator in this comparison, not just No$GBA. 3D rendering, firmware-dependent features, and the DS’s more complex timing model mean DS hacks are more likely to show graphical glitches or crash outright on any given emulator, No$GBA included. If a DS hack misbehaves, the first troubleshooting step is confirming whether it also misbehaves on melonDS or DeSmuME before assuming No$GBA is specifically at fault.
Performance Expectations: No$GBA on Old and New Hardware
One reason No$GBA keeps a following is that its system requirements have barely changed since the mid-2000s, while most of its competitors have added rendering layers, shader pipelines, or networking stacks that assume a reasonably modern CPU. The table below reflects practical, hands-on expectations rather than official benchmark numbers, since Korth’s site does not publish formal performance figures.
| Hardware era | GBA Pokémon games | DS Pokémon games | Notes |
|---|---|---|---|
| 2008-2012 era laptop (dual-core, 2-4 GB RAM) | Full speed | Full speed in most scenes | Battle animations may dip during heavy particle effects |
| 2013-2018 era laptop (quad-core, 8 GB RAM) | Full speed, no tuning needed | Full speed | Comfortable headroom for debugger overhead |
| 2019-2026 modern laptop or desktop | Full speed, trivial load | Full speed | No$GBA uses a small fraction of available CPU |
| Wine on Linux (any era above) | Full speed in most configurations | Full speed, occasional audio tuning needed | See the dedicated Wine section below |
| Low-power handheld PCs (fanless, budget x86) | Full speed | Usually full speed; test individually | No$GBA’s light footprint is its main advantage here |
The practical takeaway: performance is rarely the reason to choose or avoid No$GBA in 2026. Unlike Dolphin struggling with GameCube-era 3D or RPCS3 needing a modern multi-core CPU for PS3 titles, GBA and DS hardware is simple enough by current standards that almost any emulator, No$GBA included, runs it at full speed on almost anything. Pick No$GBA for its debugger and its small footprint, not because you expect a speed advantage over melonDS or mGBA on hardware made in the last fifteen years.
Step 1-3: Download and Install No$GBA Safely
Step 1: Choose the Right Build
No$GBA ships three separate downloads from the same page, and picking the wrong one is the single most common setup mistake people make. The gaming build is a small, roughly 210 KB Windows executable meant purely for playing games. The debug build is around 1.5 MB and adds the tracer, breakpoints, and memory viewer covered in step 13. A legacy DOS gaming build also exists for retro hardware, which almost nobody needs in 2026 unless they are deliberately running period-correct hardware.
For most Pokémon players, download the gaming build first. ROM hackers and anyone who wants to follow step 13 should grab the debug build instead, since it is a superset of the gaming build’s features.
Step 2: Extract and Verify the Files
No$GBA distributes as a ZIP archive with no installer. Extract it to its own folder rather than a shared “emulators” directory, since No$GBA writes its configuration and save data into the same folder as the executable by default.
C:EmulatorsNoGBA306
├── NO$GBA.EXE (gaming build executable)
├── NO$GBA-DEBUG.EXE (debug build, if downloaded)
├── BIOS (optional: your own dumped firmware)
├── ROMS (your legally dumped .gba / .nds files)
└── SAVES (created automatically on first save)Keep ROMs and save files inside this folder structure for the rest of the guide; No$GBA’s relative-path handling is simple and gets confused by ROMs stored on network drives or inside OneDrive-synced folders that lock files during saves.
Step 3: Run It for the First Time
Double-click NO$GBA.EXE (or NO$GBA-DEBUG.EXE). Windows SmartScreen will likely flag the file since it is an unsigned executable from a small independent developer; this is expected for No$GBA and has been the case for years, not a sign of a bad download, provided you got the file from problemkaputt.de or GBATek. Click “More info,” then “Run anyway.”
On Linux or macOS, install Wine first, then run the executable through it from a terminal in the extracted folder. Expect the window chrome to look slightly different and expect some audio crackle until you tune the sound buffer in step 6.
wine "NO$GBA.EXE"Step 4-6: First Launch, BIOS, and Core Configuration
Step 4: Load Your ROM
From the File menu, choose “Insert Cartridge” (GBA) or “Insert Disk” (NDS) and point it at your ROM. No$GBA auto-detects whether a file is a GBA or NDS title from its header, so you do not need to switch modes manually. The title screen should appear within a second or two; if it does not, skip ahead to the troubleshooting section before changing anything else.
Step 5: Point No$GBA to a Firmware Dump (Optional, DS Only)
Open Options → BIOS/Firmware. If you have dumped the firmware from Nintendo DS hardware you own, point No$GBA to that file here. GBA-only players can skip this step entirely, since No$GBA’s GBA mode runs most commercial Pokémon ROMs without an external BIOS file.
Step 6: Set Emulation Speed and Audio
Open the Options menu and set Emulation Speed to “Unlimited MHz.” On GBA titles this typically runs well above native speed on any CPU from the last ten years, so you will mostly use fast-forward only for grinding encounters or EV training. For sound, drop the Sound Output sample rate to “Low (10 kHz)” only if you hear crackling; most modern machines handle the default rate fine, and lowering it is a workaround for older or Wine-based setups, not a universal recommendation.
Options > Emulation Speed > Unlimited MHz, Disaster 10%
Options > Sound Output > Default (44 kHz) -- lower to 10 kHz only if audio crackles
Options > Video > choose window scale (2x or 3x recommended for GBA)Step 7-9: Controls and Performance for GBA Pokémon Games
Step 7: Map Your Keyboard or Gamepad
Open Options → Controls. No$GBA lists each GBA button (A, B, L, R, Start, Select, and the D-pad) next to an empty field; click a field and press the key or controller button you want assigned. A typical FireRed/Emerald layout maps A to X, B to Z, Start to Enter, and Select to Backspace, leaving arrow keys for the D-pad, but any layout that keeps A and B on adjacent keys works fine for Pokémon’s menu-heavy interface.
If you would rather start from a known-good layout than build one from scratch, the table below is a reasonable default for anyone coming from a standard QWERTY keyboard.
| GBA/DS button | Suggested key | Used for in Pokémon games |
|---|---|---|
| A | X | Confirm, talk to NPCs, advance text |
| B | Z | Cancel, run (when held), close menus |
| Start | Enter | Open the main menu |
| Select | Backspace | Register an item for quick use (GBA titles) |
| D-pad | Arrow keys | Movement, menu navigation |
| L / R | A / S | Scroll Pokédex pages, Box navigation |
This mapping is a starting point, not a requirement. Players coming from a USB or Bluetooth controller can assign the same logical buttons to a gamepad instead; No$GBA detects most Windows-recognized controllers in the same Controls menu without extra driver installation.
Step 8: Set Frame Skip and Rendering Options
Pokémon’s GBA titles rarely need frame skipping on modern hardware, so leave this at 0 unless you are running No$GBA through Wine on constrained hardware. If you do need it, increase it one step at a time and test a battle animation, since Pokémon’s attack animations are the first thing to visibly stutter when frame skip is set too aggressively.
Step 9: Save Your Configuration
No$GBA writes its settings to an INI file in the same folder as the executable once you close the emulator normally. Confirm this worked by checking for a NO$GBA.INI (or similarly named) file after your first session; if it is missing, your Windows user account likely lacks write permission to the folder, commonly because the emulator was extracted into Program Files.
Step 10-11: Loading Nintendo DS Pokémon Games
Step 10: Set Up the Dual-Screen Layout
Load a DS title such as Pokémon Platinum or HeartGold the same way you loaded a GBA ROM in step 4. Options → Video lets you choose how the two DS screens are arranged: stacked vertically (the default and most faithful to the original hardware), side by side, or a single enlarged top screen with the bottom screen shrunk into a corner. Vertical stacking is the easiest starting point for Pokémon, since the bottom screen’s touch menus stay a comfortable size.
Step 11: Map the Touchscreen to Your Mouse
DS-era Pokémon games lean on the touchscreen for the Pokétch app, capturing Pokémon with the stylus in some side content, and navigating save/menu screens. No$GBA maps the bottom screen to mouse clicks automatically once a DS ROM is loaded, so you simply click where you would normally tap the stylus. If clicks land in the wrong spot, re-check that you selected the correct screen-layout option in step 10, since offset clicks are almost always a layout mismatch rather than a calibration bug.
This is also the point to set expectations about multiplayer. No$GBA documented parts of the Nintendo DS wireless protocol years before most open-source emulators touched it, but according to emulator-compatibility trackers its connections commonly reach the handshake stage and then fail before a Union Room or local wireless session actually starts. If your save file depends on trading evolutions like Scyther into Scizor, do not plan your save around No$GBA’s wireless; use melonDS for that specific task, covered in our melonDS Pokémon setup guide.
Step 12-13: Save Management and the Built-In Debugger
Step 12: Configure Save Type and Back Up Your Progress
Most commercial Pokémon ROMs auto-detect their save type (Flash, EEPROM, or SRAM for GBA titles), so you rarely need to set this manually. What you do need is a backup habit: copy your .sav file out of the SAVES folder before trying a new cheat code, a ROM hack patch, or an emulator update. Save corruption in No$GBA is almost always caused by force-closing the emulator mid-write or switching ROM revisions without renaming the save file, not by a bug in the save routine itself. For a system that survives emulator-hopping and reinstalls, see our dedicated Pokémon emulator save backup guide.
Step 13: Turn On the Debugger (Debug Build Only)
If you downloaded NO$GBA-DEBUG.EXE in step 1, you now have access to a register viewer, a disassembler, breakpoints, and a live memory window, the same tools GBATek documents as aimed at “professional developers.” Open it from the Utility menu. This is the feature that separates No$GBA from every other emulator covered on this site: you can pause execution the instant a specific memory address changes, which is exactly how ROM hackers confirm a patched script is writing the correct byte during a battle calculation.
Utility > Debugger > Open Debug Window
Set a breakpoint: right-click an address in the memory view > "Break on Write"
Example watch expression for a GBA Pokémon battle-damage routine:
02024284h (example address; the real one depends on the specific ROM/version)
Step execution: F10 (step over), F11 (step into)Treat any memory address you find in a ROM-hacking forum as specific to that exact ROM revision; addresses shift between regional releases and even between patch versions of the same hack. If you are patching a hack rather than writing one from scratch, our guide on how to patch and play Pokémon ROM hacks covers the patching workflow that typically comes before you ever need the debugger.
Why No$GBA Still Struggles With Pokémon DS Local Wireless
It is a point worth spending a full section on, because so many setup guides gloss over it. Generation 4 and 5 Pokémon games (Diamond, Pearl, Platinum, HeartGold, SoulSilver, Black, and White) replaced the old link-cable trading system with local wireless and the in-game Union Room. Emulating that cleanly means emulating two DS consoles that can see each other over a simulated wireless link, a much harder problem than emulating a single console in isolation.
Community emulator-compatibility trackers list No$GBA as having begun implementing parts of this system years ago, while identifying melonDS as the first emulator to get local wireless working reliably enough for genuine Pokémon trading and battling between two instances. That gap has not closed as of No$GBA 3.06. Try setting up a two-window trade in No$GBA and expect the connection handshake to start, then stall, rather than fail with a clear error, a frustrating way to lose twenty minutes before realizing the feature simply is not finished.
| Use case | No$GBA | Recommended tool instead |
|---|---|---|
| Single-player GBA Pokémon (FireRed, Emerald, etc.) | Works well | No$GBA is a fine choice |
| Single-player DS Pokémon (Platinum, HeartGold, etc.) | Works, with caveats | No$GBA is usable; melonDS is more actively maintained |
| Local wireless trading/battling between two instances | Unreliable | melonDS |
| ROM-hack debugging with breakpoints and memory view | Works well | No$GBA debug build is a strong option |
| Running on Android or a handheld | Not supported | Our mGBA for Pokémon GBA games guide |
Common Pitfalls When Setting Up No$GBA
These are the mistakes that come up most often when people set up No$GBA for the first time, roughly in order of how often they happen.
- Extracting into Program Files. Windows blocks write access there by default, so No$GBA cannot save its INI file or your game saves. Extract to a folder under your user directory or a dedicated drive instead.
- Downloading from a “portable” or repacked mirror. These sometimes bundle adware installers or ship outdated builds missing bug fixes from 3.06. Get it from problemkaputt.de or the GBATek tools listing.
- Mixing up the gaming and debug builds. If the debugger menu is missing, you launched the gaming build; redownload the debug build instead of assuming the feature was removed.
- Assuming GBA link-cable trading and DS wireless trading work the same way. They are different systems in different Pokémon generations, and No$GBA’s limitations differ between the two.
- Forgetting to back up saves before patching a ROM hack. A bad patch applied to an already-saved file can corrupt hours of progress; always patch a clean ROM copy.
- Running No$GBA from a cloud-synced folder. OneDrive, Dropbox, and similar services can lock the save file mid-write, which looks identical to a corrupted save but is actually a file-locking conflict.
- Expecting DOS-build performance quirks on the Windows build, or vice versa. The two builds have different rendering paths, so troubleshooting advice for one does not always apply to the other.
Troubleshooting No$GBA: 8 Common Issues and Fixes
| Symptom | Likely cause | Fix |
|---|---|---|
| Windows SmartScreen blocks the download | Unsigned executable from a small developer | Click “More info” then “Run anyway”; this is normal for No$GBA |
| Game won’t save progress | Emulator lacks write permission to its folder | Move the folder out of Program Files; run as a normal user |
| Audio crackles or pops | Sample rate mismatch, especially under Wine | Lower Sound Output to 10 kHz in Options |
| Black screen after loading a ROM | Corrupted or incomplete ROM dump | Re-dump the cartridge or re-verify the file’s checksum |
| Touchscreen clicks land in the wrong place (DS games) | Screen layout mismatch | Re-check the Video > screen layout setting from step 10 |
| Two instances won’t connect for local wireless | No$GBA’s DS wireless implementation is incomplete | Switch to melonDS for trading/battling specifically |
| Cheats don’t apply | Code format mismatch (Action Replay vs Codebreaker) or wrong ROM revision | Re-verify the code was written for your exact ROM version |
| Debugger menu is missing | Gaming build launched instead of debug build | Close it and launch NO$GBA-DEBUG.EXE instead |
Advanced Tips for Power Users
Once the basics work, a few advanced habits get more out of No$GBA, particularly for ROM hacking and testing work.
- Launch with command-line parameters for repeatable test sessions. No$GBA accepts a ROM path as a launch argument, so a batch file can open a specific test ROM directly instead of clicking through the File menu every time you relaunch after a build.
- Use the debugger’s “Break on Write” feature on save-data addresses to confirm a ROM hack’s custom save routine is not corrupting adjacent memory, a common bug class in hand-edited Pokémon hacks.
- Keep a separate, clean copy of each base ROM before patching, so a bad IPS or UPS patch never touches your only copy.
- Cross-check debugger findings against mGBA’s own test suite when you are unsure whether a timing quirk is a No$GBA emulation inaccuracy or a genuine bug in the ROM hack; mGBA is widely treated as the GBA accuracy reference point.
- Document memory addresses per ROM version in a plain text file alongside your hack’s source, since addresses found for one revision will not match another.
- Keep a second No$GBA instance pointed at an unmodified base ROM as a reference, so you can diff behavior between the vanilla game and your hack when a bug report is ambiguous about whether it is hack-specific.
- Pair the debugger with a public Pokémon RAM map for your generation rather than guessing addresses by trial and error; community-maintained RAM maps for Gen 3 and Gen 4 games cover the vast majority of values a hack developer needs, from party data to battle variables.
:: Example batch file for a repeatable test launch
@echo off
cd /d "C:EmulatorsNoGBA306"
NO$GBA-DEBUG.EXE "ROMSpokemon_firered_test_build_12.gba"Complete Working Project: A Full No$GBA Pokémon FireRed Debugging Session
To tie every step together, here is what a complete, working setup looks like end to end, using Pokémon FireRed as the example ROM.
- Download No$GBA 3.06’s debug build from problemkaputt.de and extract it to C:EmulatorsNoGBA306.
- Launch NO$GBA-DEBUG.EXE, click through the SmartScreen warning, and confirm the main window opens.
- Load your legally dumped Pokémon FireRed ROM via File > Insert Cartridge.
- Set Emulation Speed to Unlimited MHz and leave Sound Output at the default rate.
- Map A, B, Start, Select, and the D-pad under Options > Controls, testing each button on the title screen.
- Start a new game, and confirm audio and input both respond correctly through the first few menus.
- Save once you reach the first Pokémon Center, then immediately copy the .sav file to a backup folder.
- Open Utility > Debugger, and set a “Break on Write” watchpoint on your party’s first Pokémon’s HP address (found via a public GBA Pokémon RAM map for your specific ROM revision).
- Enter a wild battle and confirm the breakpoint fires exactly when damage is calculated, verifying the debugger is tracking the correct address.
- Step through execution with F10/F11 to watch the damage-calculation routine run instruction by instruction.
At this point you have a working GBA Pokémon session with a live debugger attached, a combination most other emulators on this site simply do not offer in one package. If your actual end goal is patching a community ROM hack rather than building a debugging session from scratch, swap step 3 for the patching process in our ROM hack patching guide and rejoin this walkthrough at step 4.
No$GBA on Linux and macOS via Wine
Since there is no native build for either platform, Linux and macOS users run No$GBA through Wine. Install Wine through your distribution’s package manager, or via Homebrew/CrossOver on macOS, then run the executable exactly as described in step 3. Two Wine-specific quirks come up often: audio crackle, fixed the same way as on native Windows by lowering the sample rate in step 6, and window-focus issues where keyboard input stops registering after alt-tabbing, fixed by clicking directly inside the No$GBA window before resuming play. Performance is generally not a concern, since No$GBA’s GBA mode is light enough that Wine’s overhead rarely matters.
Legal and Safety Notes
No$GBA itself is freeware and legal to download and run. The legal risk in any emulation setup comes from ROM and firmware files, not the emulator. Dump ROMs only from cartridges you own, using your own hardware and a cartridge reader; the same applies to any Nintendo DS firmware you choose to load in step 5. Avoid ROM download sites entirely. Beyond the legal exposure, bundled “ROM pack” downloads are a common vector for malware disguised as game files.
Frequently Asked Questions
Is No$GBA free?
Yes. Both the gaming build and the larger debug build are free downloads from Martin Korth’s own site, problemkaputt.de. There is no premium tier or subscription version.
What is the latest No$GBA version in 2026?
Version 3.06, released in April 2025, is the current build listed on both problemkaputt.de and the GBATek tools index at the time of writing. No newer numbered release had been published as of October 2026.
Can No$GBA play Pokémon Nintendo DS games?
Yes, single-player. No$GBA emulates NDS and DSi hardware alongside GBA, so Diamond, Pearl, Platinum, HeartGold, SoulSilver, Black, and White all load and play normally offline. Local wireless trading and battling between two No$GBA windows is the part that remains unreliable.
Why can’t I trade Pokémon between two No$GBA windows?
No$GBA implemented parts of the Nintendo DS wireless protocol, but community compatibility trackers report that its connections typically stall before a session is fully established. melonDS is the emulator with documented, working local wireless support for this specific use case.
Do I need a BIOS file to use No$GBA?
Not for GBA mode; No$GBA boots most commercial GBA ROMs without a separate BIOS file. For Nintendo DS games, loading your own dumped firmware can improve compatibility on specific titles, but it is not strictly required for every game to boot.
What’s the difference between the gaming build and the debug build?
The gaming build is a small executable, around 210 KB, meant for playing games with no extra tooling. The debug build, around 1.5 MB, adds a register viewer, breakpoints, a disassembler, and a live memory window aimed at ROM hackers and developers. The debug build includes everything the gaming build offers plus these extra tools.
Does No$GBA run on Mac or Linux?
Not natively. There is a Windows build and a legacy DOS build; Mac and Linux users run the Windows executable through Wine or a compatibility layer such as CrossOver.
Is No$GBA better than mGBA for Pokémon GBA games?
They solve different problems. mGBA is open source, more actively updated (its current stable build is version 0.10.5 from March 2025), and widely treated as the accuracy reference for GBA emulation. No$GBA’s advantage is its built-in debugger, which mGBA does not match for low-level memory inspection. Players who just want to play should generally reach for mGBA, covered in our mGBA Pokémon setup guide; ROM hackers who need a debugger should reach for No$GBA.
Does No$GBA support Action Replay and Codebreaker cheat codes?
Yes, through the Utility menu’s cheat code entry screen, which accepts both formats. Compatibility depends on matching the code to your exact ROM revision and region; a code written for the US release of a Pokémon game will often fail silently or behave incorrectly against a European or Japanese dump of the same title.