(his name is Geminiman he can create a clone of himself) i was playing gears of war (no i don't play online mode which is only available in the PC version) when i paused the game and went over to see what rex was doing and he was fighting against Geminiman which i haven even got too on my nes i had to have my son help me cause i die many times on his stage so he is the second hardest boss i have seen other then airman