Get Waluigi

To get Waluigi, just reset the game but hold the reset for an hour and when it turns back on, you should hear "Waluigi!" instead of the driver's sound. Now, go to the driver sel;ect screen and hold L and R and Waluigi should replace Wario.

Get Shy guy

To get Shy guy, pick wario and get 1st in every race in every cup in every difficulty level. Now, as Wario, get an item box in VS. mode with your enemy being Mario and you should get a shy guy charm. Get killed, then go to the Character Selection Screen and press c-up, c-down, c-left, and c-right at the same time, then, while holding L and R, press down. Shy guy will appear the other characters. Shy guy has the speed of Bowser and the acceleration of Toad and also toad's off-road ability. His weight matches Luigi's, but if he hits any other player, including Bowser, that player will spin out.

quote MasterDan

quote XsLashEr325

Why dont you all go submit these in as cheats, I'm pretty sure it will be helpful.

They are made-up codes.

I think he was being sarcastic.

To get Kirby, beat the game with all the characters 5,000 times in a row WITHOUT TURNING OFF THE GAME!!! Next, win the battle mode 5 times with Toad, and Kirby will challenge you to a race. Win and he'll be a character replacing Peach. Kirby rides on a Warp Star and is the fastest character in the game.

Get Link

To get link, first finish the Extra setting with Bowser, then Toad, 40 times in a row in 1st in all the races. Now, win 220 battle games with anyone and Link will challenge you to a battle. Beat him, go to the title screen, and press Right-C, R, L, and Z all at the same time. Link will be under Wario.