Playing Kingdom Hearts on DS Emulator: Which Game Do You Mean?

Kingdom Hearts (PS2) does not run on a DS emulator. You likely mean:

• Kingdom Hearts 358/2 Days (NDS) – Runs on melonDS, DeSmuME, DraStic (Android). 3D cutscenes may lag; use "Frameskip 1" + "JIT" (melonDS).
• Kingdom Hearts Re:coded (NDS) – Same emulators; better performance.
• Kingdom Hearts χ / Union χ – Browser/Mobile only; not emulatable (server dead, private servers exist).

For PS2 KH1/KH2/CoM/BBS

Use PCSX2 (PC) / AetherSX2 (Android) / Play! (Cross-platform). Requires decent CPU/GPU. PS2 BIOS required (dump from own console).

Legal Note

Emulation is legal; downloading BIOS/ROMs/ISOs you don't own is piracy. Dump your own games (DS: GodMode9 on 3DS; PS2: DVD dumper on modded PS2/FreeMCBoot).