A free program for Android, by Action Games Studio Arcade.

PureEMU is a powerful and free Android game emulator. It is an emulator-only application; which means no game files are included.

The emulator includes:- Emulator for PSP- Emulator for N64- Emulator for GBA- Emulator for SNES- Emulator for GBC- Emulator for GB- Emulator for NES- Emulator for PCE- Emulator for GENESIS MD- Emulator for 2600- Emulator for MSX 1- Emulator for MSX 2- Emulator for NGP- Emulator for SMS 

You can try downloading this app so you can practice your skills on the emulators included above. No worries, this is free of charge and you can use it upon the download is done.