King Mickey Mouse (currently voiced by Bret Iwan) is the good-hearted king of ToonTown, the place where all toons live. He passes his advice down to Jaden and Jeffrey whenever they need it. Mickey wields a Keyblade, just like Sora and Riku, and is a warrior of the Light. He is a Keyblade Master and the chosen Keyblade Wielder for the Realm of Darkness, though he follows the path of light. His teacher is Master Yen Sid, and his wife is Queen Minnie Mouse.
King Mickey appears at the end of the first Kingdom Hearts game, where he appears on the other side of the Door to Darkness with Riku to help Sora seal it and prevent the Heartless from escaping.
- King Mickey will guest star in Jaden's Adventures of Cat's Don't Dance.
- King Mickey makes an appearance in Jaden finds out Who Framed Roger Rabbit?
- In the Jeffrey & Friends' Adventures series, Mickey will be one of Jeffrey's powerful allies and one of his mentors. In Xion's Keyblade Training, he personally oversees Xion's training.
- King Mickey will attend Jeffrey and Aqua's wedding in Key of Flaming Union.
- King Mickey will appear again in Jeffrey, Jaden & Friends' Storm Adventures of Kingdom Hearts: Dream Drop Distance.
- Since Oswald was created before Mickey was, this makes him Oswald's little brother.
- Mickey will meet Bugs and Daffy's team in Bugs and Daffy's Adventures of Mickey, Donald, and Goofy: The Musketeers. He and Goofy will eventually join the team in Bugs and Daffy's Adventures of Fantasmic!
- Mickey will guest star in Jeffrey, Jaden & Friends' Storm Adventures of Big Hero 6 and Jeffrey, Jaden & Friends' Storm Adventures of Avengers: Age of Ultron.