Pro Action Replay Codes:
Infinite Time - 00C02E:63 -Rune

Game Genie Codes:
0 to max speed instantly - 215-2CC-4C2 + 022-5EC-E69 -Galoob
Infinite time - 00B-C1C-3BE -Galoob
Always rank first in qualifying race - AF6-2CE-08F -Galoob