SuperMonkey

Supermonkey is a BTD character that appeared in BTD6: The Novel and Bloons Farmer Smith. He has a cybernetic arm leftover from becoming Cyber, which means he's not completely unRobotized. For some odd reason it worked with everything except for the arm. Possibly it's because Advanced cybernetics is still experimental. For his original counterpart see here:

Trivia
Although Supermonkey is the official spelling for his name, in the trailer for the Supermonkey movie, and the official BTD franchise, his name is spelled Super Monkey. Sometimes in the Supermonkey franchise, his name is also spelled SuperMonkey.