King K. Rool (Donkey Kong) – Killer Croc
Man eating crocodile monster? King K. Rool has you covered, as he is literally a big crocodile monster. K. Rool fits the bill as being merciless. Even his name is a pun of the word cruel.
K. Rool is absolutely ruthless when he’s going after what he wants, and even his own subjects fear his wrath. He rules through a mix of intimidation and violence. Even while fighting Donkey Kong, he resorts to dirty tricks like pretending to be down, only to take his opponents by surprise. K. Rool is the perfect replacement for Killer Croc on any team, he brings the sheer strength and insanity that his amphibious counterpart already has.