Captain Camo was bred on Kamino like more than half of the Grand Army of the Republic. He was one of the clones who was experimented on to make their physical abilities and wisdom be increased. In Camo's case, it mind him a wisecrack and a joking kind of guy when he was a deadly clone trooper deep down. He was trained to be an Advanced Recon Force trooper, which is why he has the appearance he has today.