King Gruesome is the main antagonist of the anime film Alakazam the Great.

He talks, but it is unknown who did his English-language voice. He has a human queen, and a young spy named Fester.

He intends to kill Prince Amat, and bribes Fester with a reward to get him to do what he wants him to do. But when Fester is done, instead of giving him the reward, he just captures him. At last, when Alakazam has become a hero while learning about humility, King Gruesome transforms into a bull-like creature and falls into a volcano and died.