Enter "CHEAT" as a profile name to unlock the cheat menu. From there you can use the codes below:
Successfully complete amateur, expert, or master modes with each of the seven original unlocked pilots to unlock their nemesis.
Successfully complete master mode with each of the seven original unlocked pilots to unlock Ka Hekili.
Successfully complete master mode with Ka Hekili to unlock Kutoo.
Successfully complete expert mode with each nemesis pilot (bottom row) to unlock the eight Easter Eggs. They are unlocked in the following order: Ultra Focal Length, Super Blurrrrrrrrrr, Atlantis mode, Fruity Fruit, Always Raining, Blur, Slide
Successfully complete master mode with every pilot to unlock Redshift mode.
Upgrading the ship is crucial to finishing this game. The basic premise is to have the racer's ultimate weapon by the end of your first master race. Follow any course you can, but that weapon is crucial to winning the races ahead. The premise is this. Race smart, but not hard. Stay in the back of the pack building up your weapons. You have five laps to eliminate five people. On the tracks such as Fuusoka City, where they all bunch up in the turns, it is possible to remove every other racer by the third lap.