NitroGrafx is a PC-Engine/TurboGrafx16 emulator for the DS by FluBBa. Most things from PCEAdvance are ported over and most games run quite good.

Changes:

*Fixed CPU cycles per scanline (455, confirmed on hardware).
*Fixed timing of scroll register writes.
*Fixed Sprite DMA IRQ handling.
*Fixed savestates a bit (should be compatible between versions now).
*Fixed scaling after loading savestate.
*Fixed caching of Bios.
*Better timing of ADPCM playing (still no sound though).
*Debug output now optional, also more info is written.

http://www.ndsretro.com/