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Mario Kart: Double Dash!!

Glitches

Pipe Plaza Glitch

In the balloon battle mode on the Pipe Plaza map. if an enemy hits you into a pipe with their weapon, and you are thrown through the pipe then you will not lose a balloon. Instead, you will come out of the pipe with stars around you and it will appear as though you just drove through the pipe.

Contributed By: vulcandragon.

Unlockables

Racing Rewards

To unlock everything, just win Gold on every Cup in every difficulty.

UnlockableHow to Unlock
Finish the Special Cup in 150CCAll Cup Tour (All 4 Cups in one)
Earn Gold trophies for all cups in all race classesAlternative "Thanks for Playing" Screen
Earn Gold trophies for all cups in all race classesAlternative Start Screen
Finish the Star Cup in 150CCBarrel Train (Diddy Kong's Kart)
Finish the Flower Cup in 50CCBloom Coach (Daisy's Kart)
Finish the Special Cup in Mirror ModeBoo Pipes (King Boo's Kart)
Finish the Special Cup in 50CCBullet Blaster (Bowser Jr.'s Kart)
Finish the Mushroom Cup in 50CCGreen Fire (Luigi's Kart)
Finish the Star Cup in Mirror ModeKing Boo, Petey Piranha, Piranha Pipes (Petey Piranha's Kart)
Finish the Mushroom Cup in 150CCLuigi's Mansion (Battle Mode Arena)
Finish the All Cup Tour in 150CCMirror Mode (Selectable at the CC selection)
Finish the Star Cup in 50CCPara Wing (Koopa Paratroopa's Kart)
Finish the All Cup Tour in Mirror ModeParade Kart (Belongs to Toadsworth, but he doesn't race)
Finish the Mushroom Cup in 100CCRattle Buggy (Baby Luigi's Kart)
Finish the Star Cup in 100CCSpecial Cup (Wario Colosseum/Dino Dino Jungle/Bowser's Castle/Rainbow Road)
Finish the Flower Cup in Mirror ModeTilt-A-Kart (Battle Mode Arena)
Finish the Special Cup in 100CCToad, Toadette, Toad Kart (Toad's Kart)
Finish the Mushroom Cup in Mirror ModeToadette Kart (Toadette's Kart)
Finish the Flower Cup in 150CCTurbo Birdo (Birdo's Kart)
Finish the Flower Cup in 100CCWaluigi Racer (Waluigi's Kart)

Contributed By: CaptainDrakesGhost.

Staff Ghosts

To unlock the staff ghost for each time trial track, beat the following times. Be sure that the "Time Trial Ghost" option in the options is turned on at the time of completion.

UnlockableHow to Unlock
Beat a time of 1:14.000Baby Park Ghost
Beat a time of 2:47.000Bowser's Castle Ghost
Beat a time of 1:55.000Daisy Cruiser Ghost
Beat a time of 2:03.000Dino Dino Jungle Ghost
Beat a time of 2:15.000DK Mountain Ghost
Beat a time of 1:53.000Dry Dry Desert Ghost
Beat a time of 1:29.000Luigi Circuit Ghost
Beat a time of 1:44.000Mario Circuit Ghost
Beat a time of 1:34.000Mushroom Bridge Ghost
Beat a time of 1:53.000Mushroom City Ghost
Beat a time of 1:23.000Peach Beach Ghost
Beat a time of 3:19.000Rainbow Road Ghost
Beat a time of 1:28.000Sherbet Land Ghost
Beat a time of 2:02.000Waluigi Stadium Ghost
Beat a time of 2:24.000Wario Colloseum Ghost
Beat a time of 2:02.000Yoshi's Circuit Ghost

Contributed By: Deathborn 668.

Easter Eggs

Japanese Contest code

After completing a Time Trial race (When it says Retry, Change Track, etc,), press L,R,L,R,X,Y,X,Y,Z. The code that pops up was for a Japanese contest. Totally useless, but it's interesting that they forgot to take that out.

Contributed By: Gamecube_Gamer.

Secrets

Mario Circuit Goomba Boosts

If the Goombas on Mario Circuit are hit with a turtle shell, they will be squished into the ground and a boost will fly off them. If a thunderbolt is used on the course, it will squish them all and there will be several boosts lying in that area. It doesn't work the same as the mushroom cars; if you hit a goomba they stay solid and you spin around a bit. Turtle shells are you're best bet.

Contributed By: MarsRose.

Mushroom City Quick Boosts

As you may have noticed on the Mushroom City course, among the traffic are vehicles shaped/colored like the Mushroom items. If you run into them, you don't spin out like you would against other cars; rather a Mushroom is thrown from the back for you to collect/use for a quick boost!

Contributed By: DBM11085.

Rainbow Road Falling Stars

You may have noticed there are a lot of stars on Rainbow Road. And many of them fall. And some of those that fall fall on the track. Where those stars fall, they turn into star items, just sitting there. Some of these are dangerously close to the edge, but if you can get one (especially when you're already near the front and there's no other way to get one) it's a nice bonus. Only problem is that they're the same color as banana peels, so be sure before you run over something yellow!

Contributed By: MarsRose.

Turbo Boost after Lakitu Retrieval

If you fall off the track or get stuck underwater for more than a couple moments, Lakitu comes to pull you out and place you on the track again. When he picks you up, wait until just before you touch the track again, then press the acceleration and you'll get a turbo boost if you timed it correctly.

Contributed By: DBM11085.