Action Replay on 3DS for DS Games: Not Compatible—Use CFW or Emulators

Action Replay cartridges **do not work** on Nintendo 3DS for DS games.

Why

• Hardware mismatch: AR DS/DSi uses Slot-1 + Slot-2 (GBA) for code injection. 3DS lacks GBA slot.
• Firmware/Security: 3DS hypervisor isolates DS mode; AR's ARM7/ARM9 hooks blocked.
• DSiWare: Some AR DSi models worked on DSi, but 3DS DS-mode blocks them.

Alternatives for DS Cheats on 3DS

• Custom Firmware (CFW) — 3ds.hacks.guide: Luma3DS + NTR/TWiLight Menu++ → built-in cheat menu (Action Replay / Gateshark codes) for DS/DSi/3DS titles. Most flexible.
• Pre-patched ROMs: DS ROMs with baked-in cheats → run via TWiLight Menu++ or nds-bootstrap on 3DS SD.
• PC Emulators: melonDS, DeSmuME, DraStic (Android) — native cheat databases, save states, fast-forward.

Caveats

• CFW voids warranty, risks brick (low on modern exploits), enables piracy if misused.
• Download cheat databases only from trusted sources (GitHub, GBAtemp). Scan files.
• Online play with cheats = ban risk.

CFW + TWiLight Menu++ is the modern standard for DS cheats on 3DS hardware.