Beast's Castle (KH:FTS)

Beast's Castle is a world that briefly appears in Kingdom Hearts: For True Story.

Kingdom Hearts: For True Story Plot Significance
Beast's Castle first appeared in Chapter 20 when a beastly creature was slicing down several Heartless until Dark Namine's Unversed hordes arrived from literally nowhere. The Beast valiantly fought them off, but all of them were ultimate destroyed when Dark Namine was defeated by Ventus-Roxas and his allies in the Fight For Destiny Islands. Afterwards, The Beast continued to fight off more Heartless that were still wandering about.

Trivia

 * Beast's Castle shares a trait with Twilight Town and Agrabah as a "cameo" world that briefly appears twice in the entire KH:FTS storyline.