Hi, I finished mario kart... How do you delete your profile?

Put the memory card with the data into the gamecube with no disk. Turn it on and the menu will come up. Select Memory Card and you will see the data on the inserted cards. Choose the one you want to delete, press A on it, then select delete. Then insert the disk, go up to play game on the main menu, then start the game and create a new file

You should be able to delete the Profile using the Menu from the Title Screen...
Otherwise, (as a last resort) you know when you turn the Game on, how the purple Cube appears and draws the 'G'???
Well, when it starts, hold the 'A' button. A Screen will appear after a while that lets you access your Memory Card, go to that and delete the Record that you have for Mario Kart!!!

Put the Gamecube power on without a disk in the drive or whatever. Go to the Memory Card option and select the memory card you save file is on (probably the first one). Click on the save file and select the delete option. Job done.

Just go to the memory card and delete it.

You need to get to the Gamecube Hard drive. You can find it by starting it with no disc inside it or when the cube thingy appears press and hold A. Go to the memory card bit, select your MKDD game and select delete.
PS If you want sonething funny to happen, press Z before the cube appears and hold it until the cube thingy appears.
PPS I'll pay you �10 to have that file copied onto my memory card.

Just take out the game, turn on your GameCube, Go to memory cart, select the Mario Kart with A, hit A on delete, and wala!

Hope I helped!
Mr Mario 4 U