Win the gold cup in the 150cc class. Then, reset the Nintendo
64 system. If done correctly, the title screen will change to
confirm that mirrored courses are enabled. Enter the 150cc option
under GP mode to access the courses. Note: When racing the
mirrored Toads' Turnpike, you will be going against the traffic.
Mario 64 castle
On the Royal Raceway course, follow the yellow road to the
right of the big jump to reach the castle from Mario 64.
View Mario Raceway record
While you are at the title screen, press R to see the best time trial record
for Mario Raceway.