Gloomius Maximus is the main antagonist of the direct-to-video film Rolie Polie Olie: the Great Defender of Fun. He is a robot space pirate and he never had any fun in his life. Because of this, he intends to steal the fun from everyone.
- Gloomius Maximus is voiced by James Woods.
- Gloomius Maximus is friends with Discord, before he (Discord) truly reformed.