CHARACTERS  

 Dr. M

Dr. M is an anthropomorphic baboon who has tried to breach the defenses of the Cooper Vault on Kaine Island for years.
However, the Vault has proved impenetrable, leading him to construct an enormous fortress around it.
With his sinister genius, Dr. M has created all manner of defenses, including a force of mutant beasts.

Dr. M apparently has a large amount of knowledge on the Cooper family.
This is caused by the fact that Dr. M filled the role of Bentley in Sly's father's gang, rather like McSweeny filled that of Murray.

Apparently, Dr. M grew tired of his sidekick role, and thus sought to steal the Cooper fortune for himself.
Despite his attempts to convince Bentley that they are exactly alike, the loyal turtle sticks with his pals.

Dr. M later engages Sly in a final battle, with Sly beating him to the edge of defeat.
M then takes a shot at Carmelita Fox, only for Sly to take it and for Carmelita to finish him.

Later, as the Cooper Vault collapses, Dr. M refuses to leave, and thus is crushed by falling stones.