Mirage Omastar was a Mirage Pokémon created by Dr. Yung. It was first seen when Yung introduced the Mirage System and was then combined with Mirage Armaldo and Mirage Kabutops into a Mirage Aggron. Mirage Master then called Omastar to get rid of Ash, Misty, Brock, May and Max, but was unable to follow them outside the castle. It was later destroyed.