Successfully complete the Hero and Dark side story modes. Then, enter story mode and a
"Last Stage?" selection will appear on the menu between the Hero and Dark selections.

Go to a Chao Garden and get a coconut. Then with a sleeping Chao, pick up the coconut and
put it by the its head. The coconut will act as a pillow.

To wake a sleeping Chao, stand next to it and whistle. You do not have to anger them by
picking them up during a nap.

Successfully complete all of Tails' stages and missions to unlock him in the Tornado 1 in
kart mode. -From: debk@efni.com

Successfully complete all of Knuckles' stages and missions with an "A" ranking to unlock
Tikal The Echinda in kart mode. -From: debk@efni.com

At the start of the City Escape stage, instead of landing on the ground with the board,
scrape the roads on the board. When on foot run full speed at a wall and get knocked down.
Pause the game if you fall after hitting the wall. Choose to restart the stage to run on
foot and not on the board.

Successfully complete all of Rouge's stages and missions to unlock her in an alternate
costume in kart mode. -From: debk@efni.com

Find one of the Skeleton Dogs; the easiest place to do so is the Pumpkin Hill stage with
Knuckles, and combine it with your Chao. With either Knuckles or Rouge, start digging
around in the Chao Garden. Eventually a pumpkin will appear. If you give it to the Chao
mixed with the Skeleton Dog it will put it on its head. If you want to take it off, either
throw or hit your Chao.

Successfully complete all of Knuckles' stages and missions to unlock him in his alternate
form in kart mode. -From: debk@efni.com

Successfully complete all of Eggman's stages and missions to unlock him in his alternate
Eggwalker in kart mode. -From: debk@efni.com