Nintendo DS Emulators for Android

The relatively new Nintendo DS emulator for Android is based on the DeSmuMe source code, has sound support, button reassignment and the ability to change button positions.

DraStic is a fast Nintendo DS emulator for Android that allows you to run most games at full speed. The emulator is paid, page on Google Play.

RetroArch is an open source emulator interface for Android (and beyond). Read more: https://wikipedia.org/wiki/RetroArch. For emulation, you need to select and download the appropriate emulator kernels in the RetroArch interface.
There are emulator cores:

• 3DO
• Amstrad CPC
• Neo-Geo
• Atari 2600/5200/7800
• Atari Jaguar
• Commodore computers
• MSX
• Fairchild Channel F
• NEC PC Engine / CD
• Nintendo 3DS
• Nintendo 64
• Nintendo DS
• NES
• SNES
• Sega Genesis / Mega Drive / Sega CD / Mega CD
• Sega Master System / GG
• Nintendo Game Boy / Color
• Nintendo Game Boy Advance
• Sega Dreamcast
• Sega Saturn
• Sony PlayStation
• Sony PlayStation 2
• SNK Neo Geo Pocket / Color
• Sony PlayStation Portable
• MAME core
• Mednafen core

Full list on the project website. You can download RetroArch on Google Play or on the official website.