Kamui

Awwww, c'mon. This could be worse but he loses all the charm of his original terrifying form. His Transmetal head is really emotive and noble in beast mode but the rest of it is dorky, from the odd choice of bronze for most of his body to the really weird alien head thingy on his robot mode chest. Also, although the hover panels are alright he looks RIDICULOUS when he activates his little foot skates. A rollerskating t-rex is NOT imposing.