Injurin' Joe is the main antagonist of the 2000 direct-to-video animated musical film Tom Sawyer. He is a massive grizzly bear who is the animal version of Injun Joe, as well Tom Sawyer's arch-nemesis.
Vote which fictional character would naturally fit in-universe with a big-named franchise! No time-travel, no interdimensional crap, no "Pooh's Adventures", they would just exist in-universe.