Captain Gantu is the main antagonist of Disney's 2002 animated feature film Lilo & Stitch. He is the brutish captain of the Galactic Federation and a longstanding rival of Experiment 626. After endangering innocent lives during his attempts to apprehend a wanted 626, Gantu was discharged from his position and forcibly went to work as Dr. Hämsterviel's henchman.
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.