Snow during trophy win:
Simply type WINTERY as a player name.

Confetti during trophy win:
Simply type CONFETTI as a player name.(Only after WINTERY cheat)

Tanks on all tracks in multi-player mode:
Simply type TANKS4ME as a player name.

No tank weapons in multi-player mode:
Simply type NOTANKS as a player name.

All tracks:
Simply type GIMMEALL as a player name.

Nine lives in single player mode:
Simply type CATLIVES as a player name.

Three lives in multi-player mode:
Simply type 3LIVES as a player name.

Faster Start:
Right before the race starts press Shift + Caps Lock