Ski upside down
Select Olympic mode and the Freestyle Aerials event. Choose any trick, and down press any buttons while moving downhill. After leaving the ramp, rapidly tap B. Then the skier will land and jump forward on his head and ski in that position.
Special medal sequences
Win a medal in all events. Then at the awards screen, press Up(2), Down(2), Left, Right, Left, Right, B, A to view the first sequence. Press Up(2), Down(2), L, R, L, R, B, A at the awards screen for the second sequence.
Select any event and country. Then, leave the name blank and press Start.
Faster curling event
Press Z after your character or the CPU has thrown the stone.
Control CPU curling
Press A or B after the CPU has thrown the stone.