Get Robot Outfit
Use trial mode to get all gold medals in the men's & Women's events. At the character select screen press L or R for the outfit. This outfit will prevent you from winning medals or getting records though.

Get Bear Outfit
Use championship mode to get all gold medals in the men's & Women's events. At the character select screen press L or R for the outfit. This outfit will prevent you from winning medals or getting records though.

Get Penguin Outfit
Use championship mode to get all gold medals in the Women's events. At the character select screen press L or R for the outfit. This outfit will prevent you from winning medals or getting records though.

Big Head Cheats
Enter these cheats before the respective event begins to have a big head:

Effect - Cheat Code

K90 Event - R, L, R, L, R, R, L, R
K120 Event - L, R, L, R, L, L, R, L
Mogul Event - Up, Up, Down, Down, Left, Right, Left, Right, L, R