Groudonzilla is a giant, evil version of a groudon. Like all pokeon turned into a "zilla", he likes crushing and eating other pokemon and destroying cities. He's one of the biggest "zillas" around, because he was already a big pokemon. He can no longer talk, and now just roars. It's currently unknown where he goes when he's not attacking a city. He was Dr. Parasect's first creation, but it is still unknown if Dr. Parasect still has any control over him.