Things You'll Need
Instructions
Hold the forward button as the countdown to the Cosmic Mario race begins. This same trick works for Shadow Mario and other races throughout the game.
Press "Z" while holding forward when the countdown gets to the number "2." Press right when the "2" appears, not too early or too late.
Push "A" right as the word "Go" appears on the screen to get the boost that lasts for a few seconds at the beginning of the race.
Save your game before starting the race, and practice several times by starting the race over more than once.
Watch the boost turn yellow for a few seconds to give a lead on any of the Mario's your competing against. Continue to race well in order to beat him.