Ztario is the doppleganger of Stario and is Oiram's Star World Counterpart as well as Mario's Ztar World Counterpart. His brother is Ztarigi. They appear in the movie Invasion of the Ztar World, an opposite non-existent world parallel to the Star World. Ztario is the main antagonist but secondary during the end when the creator of Ztar World, Cozmicalizauraus, is revealed. Ztario was defeated by Stario but was revived by Cozmicalizauraus. When the creator was destroyed Ztario, Ztarigi, and all Ztar World Counterparts were destroyed.