Red version? Blue version? Naw. How about both?
Check out this awesome modded Game Boy by Vadu Amka which mashes together all the versions of the original Pokémon games into one handheld device. Yes, even Yellow—and I'm not just talking about how that's the cartridge inside the Game Boy. If we look at other pictures, we can see some yellow highlights in here too, along with the super cute Pokeball buttons:
(Via Tiny Cartridge)