Win a Gold trophy in the Star Cup to unlock the Special Cup for that class.

Choco Island 2: SNES 

Banshee Boardwalk: Nintendo 64 

Sky Garden: Game Boy Advance 

Yoshi Circuit: GameCube

Use the following trick to help your chance of winning in almost all modes of play. When
getting a "?" box, wait until you see another item box before planting it. If timed
correctly, the "?" box that was laid down will be directly on top of where the original
one was. If anyone tries to get it, they will not be able to tell it is a fake until they
hit it.

Win a Gold trophy in all cups in the Retro Grand Prix in the 50cc class to unlock Dry
Bones.

This course is one of the longest in the game, but it has a shortcut that can cut a lot of
time off your lap. It is possible to jump over the wall to the left of the starting line
by using any one of the four small jumps there. Although you can make it over the wall
without the assistance of any speed boosting item, a Mushroom or Mini-Turbo assist is
helpful. Approach the wall at a high speed so that you are driving directly at it as you
reach the peak of the small hill. Jump right before you hit the wall and you will fly over
it. The timing requires some practice, but once you master it, it is not too difficult. It
is also possible to jump back over the wall on the other side of the starting line, but
the return jump is much more difficult and requires precise jump timing and aim.

In a ballon battle, have one ballon and get your last opponent to have one ballon also.
Then, get item blocks until you get a bomb. Then hold L or B to have the bomb hanging off
of the back of your kart and run into your opponent. You will both be blown into the air,
but you will win.

Beat all the Staff Ghost Data on the Retro tracks to unlock the Rainbow Cup in the Retro
Grand Prix.

Play a Download Play game against another player to have the option to play as Shy Guy.
Note: Shy Guy can only be used Download Play mode.

While having a throwable item in your inventory, hold L or X to hold any throwable item
behind you. This can protect you from oncoming opponent attacks from items that hit you
from behind, such as red and green shells. You are also able to store another item in your
inventory while holding your throwable item behind you.

While throwing a banana peel, press Up.

Successfully complete the indicated circuit with a time less than the target to unlock its
development team ghost racer, with the corresponding best time:

Nitro Cup: Airship Fortress: 2:10:000 

Nitro Cup: Bowser Castle: 2:20:000 

Nitro Cup: Cheep Cheep Beach: 1:45:000 

Nitro Cup: Delfino Plaza: 1:55:000 

Nitro Cup: Desert Hills: 1:35:000 

Nitro Cup: DK Pass: 2:15:000 

Nitro Cup: Figure-8 Circuit: 1:38:000 (1:36:481 best time) 

Nitro Cup: Luigi's Mansion: 2:00:000 

Nitro Cup: Mario Circuit: 1:57:000 

Nitro Cup: Peach Gardens: 1:53:000 

Nitro Cup: Rainbow Road: 2:17:000 

Nitro Cup: Shroom Ridge: 2:06:000 

Nitro Cup: Tick-Tock Clock: 1:55:000 

Nitro Cup: Walugi Pinabll: 2:24:000 

Nitro Cup: Wario Stadium: 2:15:000 

Nitro Cup: Yoshi Falls: 0:58:000 

Retro Cup: Baby Park: 0:55:000 (0:50:920 best time) 

Retro Cup: Banshee Boardwalk: 2:15:000 

Retro Cup: Bowser Castle 2: 1:53:000 

Retro Cup: Choco Island 2: 1:02:000 

Retro Cup: Choco Mountain: 2:16:000 

Retro Cup: Donut Plains 1: 1:09:000 

Retro Cup: Frappe Snowland: 2:09:000 

Retro Cup: Koopa Beach 2: 0:55:000 

Retro Cup: Luigi Circuit: 1:37:000 (1:29:759 best time) 

Retro Cup: Mario Circuit 1: 0:51:000 

Retro Cup: Moo Moo Farm: 1:18:000 

Retro Cup: Mushroom Bridge: 1:31:000 

Retro Cup: Peach Circuit: 1:13:000 

Retro Cup: Sky Garden: 1:45:000 

Retro Cup: Yoshi Circuit: 1:49:000

During a ballon battle go to the Pipe Plaza. Get a fake item cube or banana. Go into one
of the green pipes. As soon as you land, press B or L to release your fake item cube or
banana. The next time someone goes through that pipe, they will hit the item.

Win a Gold trophy in the Mushroom Cup and Flower Cup to unlock the Star Cup for that
class.