Merlock the Magician

Merlock the Magician is an evil sorcerer and the main antagonist in DuckTales The Movie: Treasure of the Lost Lamp.

Merlock played Vincent the Bear in Over the Critters' Hedge
He is a bear

Merlock played Mayor Augustus May Who in How the Rabbit Stole Christmas (2000)
He is the mayor of Whoville

Merlock played Red (Cat Form) in All Critters go to Heaven 2
He is a demon cat