Rex is a very large reptilian doglike creature found only in the world Tempest Peak Manor. His master, known as the Storm Giant, has been sucked away to the Shadowrealm 700 years ago, and he hasn't been fed since. Don't make yourself his next meal.
He is very fast and constantly follows Vexx throughout the manor. Fortunately, as long as Vexx remains above the floor, Rex has no way of getting to him. If he does fall, the player must get him to an air vent right away, which will carry him up to where Rex can't reach. Fighting him is not a smart decision, as he can't be beat. Even in Fury Mode, it's impossible. However, it's possible to outrun him if the player uses the talons to repeatedly launch Vexx over a distance.
Rex is a greenish reptile about the same size as the Leviathan from The Below, and has a sandy yellow underbelly. He has doglike ears, spikes on his back, big yellow eyes, and a large drooling lipless mouth with big yellow teeth. He has two large legs with blue spots which end with huge feet, each with two toes tipped with very sharp claws. He has no visible arms and wears a collar with spikes on it.
- Although he can't be defeated, the player can still earn points from hitting him. However, this is risky and Vexx will most likely get eaten anyway.