Joeycorn is a one-time villain from the 2016 reiteration of the Cartoon Network original series, The Powerpuff Girls, only appearing in the episode "The Last Donnycorn". He is one of the members of The Four Unicorns of The Apocalypse. He is characterized by his ninja skills.
Joeycorn, along with the three other members of The Four Unicorns of The Apocalypse, escaped from the dark magic dark mirror of darkness, in which they had been imprisoned inside of for so many years, on account of their previous acts of villainy. After being freed, Joey teamed up with his former teammates, to strike once again.
The Four Unicorns of The Apocalypse's first attack was on Unicorn World, where the team leader, Stanicorn, would absorb all the powers of the other unicorns, while his pawns stood guard at the front of his throne.
Joeycorn fought with Buttercup and he used his ninja skills. Buttercup convinced him to use his horn instead of his swords, due to the fact that she didn't have any swords and just used her power formation to make one. As the honorable ninja he was, Joeycorn accepted this challenge and fought with his horn, he did. Buttercup sliced Joeycorn's horn straight down the middle, splitting it in two, and Joeycorn cried his eyes out.