Bizarro is a DC Comics character who has interacted with the Masters of the Universe franchise via the DC Universe vs Masters of the Universe Classics figure packs.
Created to be a duplicate of Superman, Bizarro is proof positive that things don't always work out the way they're supposed to. He has caused plenty of trouble for Superman, sometimes "teaming up" with villains who take advantage of his limited intellect. Heroes who underestimate Bizarro, however, are soon reminded that, like Superman, he possesses a formidable array of superpowers. There's only one thing you can count on with Bizarro: at every turn, he'll insist on doing the opposite of Superman.
Masters of the Universe Classics
Due to Mattel holding the rights to produce toys based on the DC superheroes, it became possible for the company to release a series of "crossover" two-packs with Masters of the Universe Classics figures squaring off with characters from the DC Universe. The last of these was a Battle Armor Faker vs. Bizarro set.