The New Adventures of He-Man Season 1 Episode 1 A New Beginning

Hydron and Flipshot are sent by Master Sebrian to Eternia to find a champion of good to help them in their fight against the Evil Mutants of Denebria led by Flogg. They have a run-in with Andros and are brought to Skeletor who tricks them into thinking that he's a good guy until He-Man shows up. He-Man and Skeletor's fight is taken to Primus where He-Man proves that he's a good guy by fighting off the Evil Mutants while Skeletor forms an alliance with the Evil Mutants