The Peach Aliens are a race of peach-colored alien klay men. They explore the land to find other klay worlds aside from their own, and they bring them back to their klay world for them to be experimented on. When they arrived to the home of the blue Klayman, they notice that it's just a bunch of stupid blue blobs. To Fix this, King Whomp and the others wish to kill off the Klay people and "Start from scratch" making them smarter, bigger, and stronger, but completely changing their personality, and making them loyal to the Peach people. Their plans where thwarted however, when the blue klaymen fought back, killing them off.