Vehicle Part Unlocks
Each time you collect 50 coins, you will get a random vehicle part unlocked.
After you've collected 1000 coins, you'll have to get 100 coins for each unlocked
part. Note, this doesn't apply to the gold parts.
Getting Other Racers
When you're playing in Grand Prix mode, if you get first place on any Cup at any
CCs, it will give one of the 14 Characters at random. You can't repeat this to
unlock more people if you use the same CC and same Cup.
Unlockable Gold Parts / Awards
Gold Glider : Collect 10,000 Coins (Multiplayer gives players the total amount
of Coins collected by all players during each race)
Gold Handle : Use the Wii Handle for 50% of your most recent 100 stages
Gold Standard Kart : Get at least one star (54 points or more) on every 150cc
and Mirror Mode race
Gold Tires : Beat all of the Time Trials Staff Ghosts