Lock

Lock is a Gratalus who can shape-shift into a human-like creature.

Fighting Lizard Boy, Roboblaze and Ultra Kid
Lock defeated Ultra Kid. Together Roboblaze and Lizard Boy confronted Lock. On confronting him they realized he was a Gratalus and that he would be hard to defeat. Lizard Boy used his laser eyes (which he had just been given by Ultra Kid) but it didn't effect him. Roboblaze used his minigun but it didn't effect him. Lizard Boy then decided they should attack him at the same time. This caused Lock to explode.