|First Appearance||Super Mario Galaxy|
|Latest Appearance||Super Mario Galaxy|
Cosmic Mario is a character that appears in Super Mario Galaxy. He looks exactly like Mario, but clear. Cosmic Mario's only purpose is for Mario to race against him to try to get a Power Star. He only appears in four missions of the game. Cosmic Mario only appears in a galaxy when there is a Cosmic Comet passing through the galaxy.
- Honeyhive Galaxy - Honeyhive Cosmic Mario/Luigi Race
- Freezeflame Galaxy - Frosty Cosmic Mario/Luigi Race
- Gold Leaf Galaxy - Cosmic Mario/Luigi Forest Race
- Sea Slide Galaxy - Underwater Cosmic Mario/Luigi Race
- Shadow Mario, a disguise that Bowser Jr. wears in Super Mario Sunshine, looks similar to Cosmic Mario. Also, Cosmic Mario's voice sounds high-pitched like Shadow Mario's. Cosmic Mario could be Bowser Jr. in disguise, though this hasn't been proven.
- If the player plays as Luigi, a Cosmic Luigi appears in place of Cosmic Mario.
- If Cosmic Mario/Luigi get to the Power Star before the player, Cosmic Mario/Luigi will sit upon the star taunting the player as they get a game over.
- Enemies known as Cosmic Clones appear in Super Mario Galaxy 2. They almost look like Cosmic Mario, but they are red in color and not clear.
- A variant of the Super Guide feature from New Super Mario Bros. Wii appears in Super Mario Galaxy 2 takes form as Rosalina, but clear like Cosmic Mario/Luigi.
- Cosmic Mario is similar to II Piantissimo in Super Mario Sunshine, the Marathon Man in The Legend of Zelda: Ocarina of Time, Koopa the Quick in Super Mario 64 and Super Mario 64 DS, and the Spooky Speedster in Super Mario Galaxy.