Mario Kart: Double Dash Cheats

Unlock All Cup Tour
To get the All Cup Tour you have to beat the Star Cup on 150cc.

Unlock New Title Screen
Once you have recieved the gold trophy on Mushroom, Flower, Star, Special Cups, and The All Cup Tour on 50CC, 100CC, 150CC, and Mirror mode, like in Mario Kart 64 you will be rewarded with a new title screen featuring all of the racers.

Alternate Routes
These alternate routes, while not always faster than the normal route, may often give you more items than you'd normally get!

Luigi Circuit: After you go off the first speed boost jump after the starting gate, if you hang a right there is a little path behind the chain chomp post. Before the second U-turn, there is another alternate route behind some pipes. I found it's not much use. (These for Luigi Circuit only work in 100cc, 150cc.)

Peach Beach: Before the first item row, there is a left turn that leads you into a pipe that shoots you out into a double item. Unfortunately, it does not help you any. Before the finish line, instead of going straight, turn left and go around the fountain. There are 2 double items, but it's longer to go that way.

Mushroom Bridge: Right after the starting line there is a ramp to the sharp right. Take it, go through a pipe, and you are shot out to receive a double item. This one is also longer than just going on the track. Also, after the first tunnel, there is a road to the left. Take it to avoid all the cars on this stretch of road and get an item.

Mario Circuit: In Mirror mode, use a mushroom to go behind the chain chomp through the grass. If you can do it right, it removes a few secs from your time. I found it best to use a light kart.

Bowser’s Castle: In the big room where there is a bowser shooting fire balls instead of going around the U turn like part go straight forward in to a gap on the side of the track. Make sure you don’t just drive into it you have to power slide to the right otherwise you will fall right off the other side!