Pheak_ESP released a signed version of the CFW 3.55 Geohot of Mednafen , a multi-system emulator Mednafen (developed by Robo Hobo) for emulation of NES consoles, Game Boy, Game Boy Color, Game Boy Advance, Sega Master System, Game Gear, PC Engine, PC-Engine CD, Lynx, NeoGeo Pocket, and WonderSwan.