Monk

A Mobian gorilla who lived on the Floating Island, Monk took great pleasure in tormenting Knuckles when he was younger. Unwilling to stand by and watch, disguised members of the Brotherhood of Guardians threw Monk off the island. Several years later, he managed to climb back on, and wished to return to the way things had been, looking to beat up Knuckles. However, years of training and growing had changed Knuckles, and he was no longer so easily put to use as a punching bag.

Monk and Knuckles were forced to put aside their differences when Hunter made them the quarry in his Floating Island hunt. Bound by shock collars, the two worked together to flee Hunter. However, their victory was short-lived, as Hunter electrocuted Monk, causing the gorilla to topple once again from the island. This time, however, the gorilla perished, either from the fall, the shock, or from drowning.