Nelson Mandela Muntz[3] is a major character and recurring antagonist of The Simpsons and a child citizen of Springfield. He is the leader of the school bullies at Springfield Elementary School (despite being the youngest and shortest), even though he is also the most independent of them. He is a fourth-grader.[4]
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.