I love the designs but what about chamalien's three diffrent coloured eyes? It would be real cool if he looked like a horned tuatara since they also had a forehead eye to see in infrared. Just a suggestion to think about.
PS: I like how you made humungasaur look like a Gila monster, you should try drawing Teraspin, I would like to see what you come up with
Chamalien...Chamalien...Oh! You mean that one invisibility guy who was last seen about 2 years ago, and never got more than...2 episodes to appear in? Yeah, no wonder I completely forgot about him. Nice redesign, though!