Anti-Cosmo's Castle is the home of Anti-Cosmo and the main capital of Anti-Fairy World. It is here where the Anti-Fairies gather to discuss their plans for world domination. Here Anti-Wanda gave birth to Foop in the episode Anti-Poof. The sign over the castle's entrance says "Anti-Cosmo's Castle Welcome. Not!"
Trivia
- The Castle was first introduced in Season 6 of the entire series.
- It's the opposite of Cosmo and Wanda's Castle.
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