Chameleon Bots are undercover robots designed by General Viggo.
All Chameleon Bots share the same weakness - Their eye. Shooting their eye(s) is the only way they can be defeated.
They show up in most worlds, though only the Globe Droid needs to be defeated in order to complete the game. The Globe Droid is, however, only found in Fur Fighters: Viggo's Revenge.