How To Get Boo  -  First go to Boo Lake(Flower Cup 100cc)right after when the blue light comes up TURN IT OFF!!! Then go to Time Trial go to Boo Lake again there will be Boo, beat him then you get him. If does not do cheat again.

New Title Screen:  To see the new title screen (which just features an orange background instead of blue), complete all the circuits in 50cc, 100cc, and 150cc.

Delete game  -  Hold L + R + B + Start and power on the system to delete the current saved data.

Alternate title screen  -  Successfully complete all circuits in all classes to change the background color of the title screen.

Control player selection screen  -  Press L to shoot a green shell or press R to jump at the character selection screen.

Getting a "B" rank  -  Finish every circuit in any cup in first place and get 100 coins (25 coins per circuit).

Use horn  -  Press Select during game play to use the horn.

Double damage  -  Hit someone with a shell. You can hit them twice by going up to them and hitting them while they are spinning.

Quick restart  -  The following trick works on the Boo Lake, Broken Pier, Rainbow Road levels, or any of the Ghost Valley levels. If you fall out of bounds and Lakitu fishes you out, hold A (accelerate) about three seconds before he drops you off. If done correctly, you will get a quick boost of speed to get back in the race. Note: This does not work for levels such as the Bowser levels, where you are not raised by Lakitu very high off the ground.

Mario's Circuit: Shortcut  -  Towards the end of the circuit is a shortcut that goes to the left in a arch. You will get about 15 Coins and a Speed Booster through the finish. Watch at the start of the race to see the end of it on the left.

Luigi's Circuit: Shortcut  -  Just before the last left turn on this track, turn towards the wall on the left. There is a break in this wall. Go through it, and you will cut off a small portion of the track.

Ribbon Road: Shortcut  -  In Ribbon Road on Star Cup, get to the first ramp. Hit the turbo in front of the ramp then hit the ramp. Make a hard right and hit the second track to the left. Then, hold Right until you stop bouncing and you will be ahead of the other racers.

You can skip about one quarter of the course by using a mushroom boost immediately before the boost/jump and turning right so that you hit the road in the distance. This may take some practice.

Star Road: Shortcut  -  Note: This trick requires one mushroom. Start driving and when you see the easternmost part of the track, use the mushroom (aim for the small strip). You may have to steer right as hard as possible. If you pass it, two things can happen: you either boost off earlier or you can just let Lakatu pick you up and place you on the piece of track you skipped Note: . If you do not make it because you are too short, then wait slightly longer.

Sunset Wilds (Lightning Cup): Shortcut  -  Note: A Mushroom is required for this trick. Follow the route of the track until you reach the series of six speed ramps. Go through the speed ramps until you reach the question marks. Just to the right of the question marks is a white ramp. Use the Mushroom when you drive onto the ramp. If done correctly, you will leap back onto the track, near to the finish line. This is also useful if you are doing Time Trial.

Good items  -  When playing any track as any character, you can get good items from the mystery boxes if you are very low in rank or place. You can completely stop a race and keep anyone from finishing by turning around when the game starts, then go directly under the last item boxes in that lap so it keeps "popping". Rapidly press L and after a while you will only get Spiked Shells, then Lightning. The Lightning will be so frequent, no one will be able to move. If you do this near a player, they will spin as long as you are under a box and are rapidly pressing L.

Super power slide  -  If you master the power slide technique, you can use tight turns to your advantage. As you go into a hairpin, hold R to jump, then slide. As you straighten out, release R. If timed correctly, you will get a boost of speed.

Avoid spinning out  -  If you hit a banana peel, immediately brake while accelerating to prevent spinning out. If done correctly, a musical note will appear over your head. Note: This works with a variety of obstacles, such as rocks, puddles, ice, etc.

Avoid getting hit by opponents  -  To avoid getting hit by your opponents' shells, go through a box and get a shell or banana. If you only get one shell or banana, hold L. If you hit a banana or are shot at, the shell or banana will bounce off and not harm you. This only works once per shell. If you get three bananas or shells, press L. The three shells will remain circling around your kart. When someone shoots you or you hit a banana, you will not spin out.

Quick start  -  Press "Gas" just before the last number turns green during the pre-race countdown.

When the two lights turn yellow, press A on the last light.

On a track that is open at the start, such as Shy Guy Beach, hold [Lefor [Righ + "Brake" when Lakitu appears. Then, get a rocket start while still holding those buttons. If done correctly, you should whip around the player next to you and make a circle. When you want to go straight, stop turning. You will not slide. This is better than a normal rocket boost because you do not hit anybody while boosting. This works for all characters.

Just before a race when Lakoota is doing the lights, hit the gas which will make smoke appear. Keep the gas before the race just before the smoke comes out, there is a chance that you will get an automatic burst-start when the race begins.

Smoking tires  -  Immediately before the race starts, when the little turtle cloud appears, hold Gas. When the race starts, you will peel out or smoke your tires then take off.

Spin donuts  -  Press A + B then turn left or right.

To spin donuts backwards, press A + B then Down/Left or Down/Right. This trick may help avoid shells, etc.

Jump  -  Press R while driving to make your car jump.

Shoot  -  Press L to shoot.

Gameshark Codes

Must Be On [M] 89EC6F209693B97D   40CA9C2C0425B83A
Have 99 coins 8C1A761B31E2378B 
Press GS Button for Slow 7896079427667199 
Inf Stars NOTE: Ues only one weapon code at a time. B10AA61B905C5504   7C602BAF3615873A 
Inf Mushrooms NOTE: Ues only one weapon code at a time. B6A802186B502C2D   7C602BAF3615873A 
Inf Lightning NOTE: Ues only one weapon code at a time. 27763B33E74C50B4   7C602BAF3615873A 
Inf Boos NOTE: Ues only one weapon code at a time. A9E2B815F4B12661   7C602BAF3615873A 
Inf Bananas NOTE: Ues only one weapon code at a time. D8811DAC32131022   7C602BAF3615873A 
Inf Red Shells NOTE: Ues only one weapon code at a time. C664FA62139C3C8C   7C602BAF3615873A 
Inf Green Shells NOTE: Ues only one weapon code at a time. BA1124617DB52A3C   7C602BAF3615873A 
Inf Tri Red Shells NOTE: Ues only one weapon code at a time. 71DF921816243A9A   7C602BAF3615873A 
Inf Tri Green Shells NOTE: Ues only one weapon code at a time. 73F612684539412B   7C602BAF3615873A 
Inf Spiny Shells NOTE: Ues only one weapon code at a time. 64E40BC3F930B7F1   7C602BAF3615873A 
Inf Tri Mushrooms NOTE: Ues only one weapon code at a time. B98D913BE7628CE3   7C602BAF3615873A