Tony Hawk's Downhill Jam cheats and cheat codes for Nintendo DS

Go to the main menu, then choose the "Skateshop" option, thjen go to
"Buy Stuff" option, then choose the "Type Code" option.

Type any of the codes bellow to unlock to activate the indicated cheat effect:

Always snowskate:
Type "SNOWSK8T" as a code

Mirrored maps:
Type "MIRRORBALL" as a code

Unlock Abominable Snowman outfit:
Type "BIGSNOWMAN" as a code

Unlock Zombie Skater outfit:
Type "ZOMBIEALIVE" as a code

Note:
You have to finish the story mode first, to buy cheats without using the
codes.