He-Man and the Masters of the Universe (1983)

S01E17 Daimar the Demon

Feeling restless, Orko decides to perform a spell that summons a small, adorable creature named Daimar from a book about the dark dimension to Eternia. However, Daimar quickly transforms into a massive demon, posing a serious threat to Grayskull with his immense power. Skeletor, eager to claim that power for himself, also sets his sights on the rampaging creature, setting the stage for a fierce showdown.