Janemba
The main villain of Dragon Ball Z: Fusion Reborn, Janemba is basically evil incarnate—a demon so powerful and malevolent that he literally escaped from Hell itself. He came into existence because some kid demon forgot to keep an eye on the machine that's supposed to purify evil spirits in the afterlife. Oops.
In his initial form, Janemba looks like a massive, goofy yellow creature—almost playful, which makes him seem less threatening than he actually is. But once Goku shows up as a Super Saiyan 3 and starts winning, Janemba transforms into something way more serious: a sinister red demon with the power to match his genuinely evil nature.
Content compiled by AnimeList.moe from publicly available sources.
