Timon is a character from the popular 1994 Disney film, The Lion King. He is a meerkat who is best friends with Pumbaa.
He makes his first appearance in Epic Mickey: Power of Illusion, where he has been sucked into the Cartoon Wasteland by Mizrabel. He is trapped in the Castle of Illusion like all the other kidnapped Toons.
Simba will request that Mickey Mouse find him once he's given him the quest Meerkat Mystery. He can then be found in Prince Eric's Palace, on a high ledge.
Once he has been rescued, he will return to Simba's Room in the Fortress.