Go to the Luigi Circuit and race the course under 1 minute and 52 seconds (1:51). If you're able to do it you can then race against your ghost, "a recording of the course's best time." What's even better is that the ghost is permanently saved into the game.
Ghost Rider: Royal Raceway
Go to the Royal Raceway and race the course under 2 minutes and 40 seconds (2:40.00). If you're able to do it you can then race against your ghost, "a recording of the course's best time." What's even better is that the ghost is permanently saved into the game.
Ghost Rider: Mario Raceway
Mario Raceway has a ghost to race against in Time Trials.
Try to beat this time: 1'30"00 to get the ghost to appear.
After you beat the above times, immediately RETRY and you will see the message "Now Meet the Course Ghost."
Reverse Courses
In order to open up the
hidden courses -- all of
the courses in reverse --
you must receive the gold
cup every single race in
50cc, 100cc, and 150cc
(that's 48 courses). Once
you've done it, the title
screen will change.
Turbo Start
The Turbo Start trick
works somewhat like the
starting trick in
WaveRace 64. At the
very end of the second
light -- as it dims -- press
the A button
(acceleration). If you time
it right, you'll receive a
turbo boost that pushes
you far far ahead of the
other players. In fact,
Nintendo has
programmed it so that
you'll bust past the slower
players if you're in the last
ranks.
Big Rainbow ShortCut
Go to the Rainbow Ride Course, and at the start, before you get air on the big, long hill, take a wide turn left off the course and into midair. If you've got the correct angle and speed (which will take some practice), you'll fly through the air for nearly 10 seconds, and will land on the same course below with a sizeable bounce. While you're in mid-air pull your hand off the accleration and hit the brakes because when you land your speed will cause you to bounce right off the course.
Banana Trick
When you hit a bannana peel put on your brakes immediately. This will prevent you from skidding out. After you brake for 1 second release and give her the gas. This is really helpful in Battle Mode because you will not LOSE A BALOON.
Drafting Trick
When driving, if you can get directly behind a racer for a short time, you'll see air come off of both sides of your kart (like when you go off a ramp), and you'll get a short outburst of speed, not much, but enough to pass whomever is in front of you.