Quick start:
Immediately press A as the third light turns on during the pre-race countdown.
Negative coins:
Win a gold or platinum on the mirrored Traffic Troubles.
Digital speedometer:
Win a gold or platinum on the mirrored Motorway Mania.
Tiny racers:
Win a gold or platinum on the mirrored Freeway Phobia.
Dewey:
Win a gold in all circuits under the amateur difficulty setting to unlock Dewey.
Louie:
Win a gold in all circuits under the intermediate difficulty setting to unlock Louie.
Rainbow Goo:
Win a gold or platinum in the first three circuits under the amateur difficulty
setting.
Heckle button:
Win a gold or platinum in the first three circuits under the amateur and intermediate
difficulty settings.
Unlimited retries:
Win a gold or platinum in the first three circuits under the amateur, intermediate,
and professional difficulty settings.
Disable boost pads:
Win a gold or platinum in mirror mode on the Victory Vehicles circuit.
Victory Vehicles circuit:
Win the first three circuits under the professional difficulty setting to unlock the
Yellowstone, Everglades, Malibu, and Washington, D.C. races.
Frantic Freeway circuit:
Collect all four car parts.
Sites: