Finally got the Realboy (GB/GB Color/Super GB) emulator working!

How to use it:

Using FTPVita, transfer roms to cache0:/VitaDefilerClient/Documents/ ( you can even create another subfolders in here, like “GameBoy Roms” or “GameBoy Color” )
Drop realboy_fixup.elf on run_homebrew.bat, a menu should load
Navigate to the rom you want to play and press X/Start
Go back using Circle
In the game, press Start to Pause and Unpause the game

Additional info:

Press L + triangle to change games ( you will be returned to the menu )
Saves are stored in cache0:/VitaDefilerClient/Documents/realboy/saves
Compatible roms in the menu are written in green, and other files ( such as uvloader.log ) can’t be launched ( to prevent crashes )

From SMOKE via Twitter: Thanks to xerpi & frangar Here is the first look at #NES4Vita

As said before, I know #NES4Vita has problems. I only released it because people kept bugging me. No free time for next few days. Just relax.

How to use it:

Rename the NES rom you want to play to “rom.nes”, then transfer this rom to cache0:/VitaDefilerClient/Documents/rom.nes using FTPVita.
After that, run NES4Vita.velf by dropping it on run_homebrew.bat.

v0.2 BETA Changes:

Now includes rom selector and menu by xerpi.
You will encounter issues, that's why this is still in beta. I am working on fixing them.
Recommended to use VHL for now.