GemBoy covers the Game Boy Color and the regular Game Boy game.
GemBoy! GBC Emulator
License(s): Free Version
System(s): Game Boy, Game Boy Color
OS Supported: Android
GBA, GBC, NDS, 3DS, N64, SNES, GameCube, Wii Emulators on Windows, MacOS, Android, iOS
Pretendo is a free Nintendo DS emulator that lets you play your favorite DS games on any Android device.
DraStic is much better than nds4droid since it has more features or functions for nearly fully emulating a real NDS.