Meltdown (a.k.a Grewnge) is a tan overweight reptilian alien with four horns, a fat tail, and a gold ring dangling on one of his horns. He is voiced by Jack Angel.
He is a large, fat tan lizard-resembling alien with a pair of horns (one of which a gold ring hangs from) and a pair of antennae protruding from his head, and he sprouts a tail that is as thick as his fat legs. As one of the pirates in John Silver's crew, Grewnge seems to be the cannon's expert, which is demonstrated when he fires with great accuracy at several incoming asteroids during the destructive meteor shower as well as the longboat Jim Hawkins, Captain Amelia, and Dr. Delbert Doppler were escaping in during the pirates' siege on the Legacy. He is also provoked easily to any insult regarding his weight, as he rears in to kill Doppler for doing so, but this distraction leads to his arrest alongside the remaining crew. Despite his arrest, Grewnge is last seen cheering along with the crew for Jim for saving them from the exploding planet.