|Debut Appearance||Super Mario Galaxy|
|Latest Appearance||Super Mario 3D Land|
Cosmic Mario was first introduced in Super Mario Galaxy. He is an identical to Mario, while his appearance is blue with stars all over. He has a high-pitched voice and will only appear when a Cosmic Comet is in orbit of certain galaxies. He will be found at the start of the level and will want to challenge the player to race. They will have to race through numerous obstacles before reaching the finish before the Cosmic Mario to earn a Power Star.
When using Luigi, Cosmic Luigi will take Cosmic Mario's place. Unlike Cosmic Mario, Cosmic Luigi will use shortcuts and long jumps. This makes him faster and much more difficult to defeat in races.
Similar characters would appear in Super Mario Galaxy 2 in the forms of the Cosmic Clones and the Cosmic Spirit. The Cosmic Clones would mimic Mario's movements, while spawning more of themselves, and multiply until Mario is not able to get around and have them catch up to him. The Cosmic Spirit appears in New Super Mario Bros. Wii for the Super Guide Block. It will control Mario to a Bronze Star.
Cosmic Mario would return in Super Mario 3D Land in certain levels of the Special Worlds but in Small Mario form. He uses the same tactics as he did before and will attack Mario if he gets in his way. He can be defeated by a Starman but will respawn. In the latter Special World levels, there will be a larger version of him that slows down when Mario or Luigi get to close.