Hi All! This is a thread to help people win races on the tracks they despise most of all! It will contain most/all known shortcuts and tips!

Will be updated regularly and others can post ideas if i've missed any!
Mushroom Cup
Luigi Circuit
Description: Known as the noobiest track in MKWii, it's one of the shortest tracks in the game, meaning in a 12-player race things can get hectic. It's better to stay behind, get a good item and blast to 1st on the last lap!
Shortcuts: Two
1. ('Shroom needed) There's a trick ramp to the left of the longest straight. Gives a slight edge, but not much.
2. ('Shroom needed) On the hairpin turn, there is a sandy/grassy spot with a few pipes. If you're good enough, you can dodge the pipes, skipping the section altogether. One shroom will just make it across if you don't hit any pipes. Best to use Triple/Super 'Shroom for the best lead.
Trick Oppurtunities: One
1. (See Shortcut 1.)
Moo Moo Meadows
Description: A short track, but longer and a bit tricker than Luigi Circuit. Cows often obstruct the road on laps 2 and 3. Near the end there are a few patches of grass which can slow you down, so drive carefully!
Shortcuts: One
1. ('Shroom needed) You can cut over the grass where the 2nd set of cows will sometimes reside, cutting a large corner.
Trick Oppurtunities: Two
1. A small ramp after Shortcut 1, doesn't give much of a helping hand, I'd recommend avoiding it if you can.
2. A small boost ramp in the entrance of the grassy patches with 4 item boxes in the air, you should take this all the time as it helps you get past this part with ease.
Mushroom Gorge
Description: A unique track in MKWii, it sees you bouncing off mushrooms for half of the track. There are Goombas near the end, avoid them or kill them for a 'shroom. There are a couple of places where the track splits in two as well. For the first, go on the mushrooms. For the second, go on the lower mushrooms. Don't forget, reds bounce you, greens don't. You can trick off red mushrooms, but DON'T USE A SHROOM ON THEM OR ANY SPEED-BOOSTING ITEM! YOU WILL FALL!
Shortcuts: Two
1. ('Shroom needed) On the first mushroom, you can skip it by using a 'shroom on the boost pad, passing people if you're in a pack.
2. ('Shroom needed, NOT RECOMMENDED IN RACES, ONLY TTs) On the last turn after the Mushroom Cave, you can skip the entire turn by 'shrooming, jumping at the edge and landing on the other side. However it is VERY difficult to do. A safer method is skipping the grass a little further on.
Trick Oppurtunities: A lot (See Above)
Toad's Factory
An equal length track of Mushroom Gorge, this course has a lot of changing stuff. Firstly, there are stampers (dunno what else to call them), which will crush you like a thwomp, so avoid. The conveyor belts they're on stay the same throughout, so go on the middle one for as long as possible. On the boat, the conveyor belts go left/right, switching occasionally, carrying item boxes and wooden boxes (which slow you down if you hit them) alternately. Next there are two conveyor belts which alternate between going forwards and backwards. Get on the green one for the best boost. The last section sees you going through boost pads and mud on a final straight.
Shortcuts: One
1. ('Shroom needed, NOT RECOMMENDED) On the little bumps before the mud, you can 'shroom on the right-hand corner of the first one, sending you over the pool of water. However this is quite difficult.
Trick Oppurtunities: Four
1. Leads to the boat, unavoidable.
2. Leads to the outside of the factory, unavoidable.
3. Ramp in the middle of the mud near the end. Should use unless you can 'shroom past.
4. Bumps after trick 3.
Flower Cup
Mario Circuit
Description: A figure of 8 circuit with some mobile obstructions (Goombas, Chain Chomps etc.). A fairly simple track otherwise. You can 'Shroom across grass to cut a few corners as well. Remember, Goombas spawn 'Shrooms when killed.
Shortcuts: One
1. ('Shroom needed) Before the Chain Chomp, there is a trick ramp. No matter how fast you go over it, you will land in the grass, so Off-Road will minimize the loss.
Trick Oppurtunities: One
1. (See Above)
Coconut Mall
A complex track with many splits. Escalators alternate going up and down, so look carefully before rushing on! Taking the bottom route on leaving the mall is the best idea, but the top gives you more chance for an item box. Beware of the cars by the booster pads, they can ruin you on the last lap!
Shortcuts: One
1. ('Shroom needed) At the beginning, going to the right you'll see a corner-shop with carpet which slows you down so use the 'shroom to cross over. You can then either trick back to the normal path or go right.
Trick Oppurtunities: Five
1. Fountain Area where splits converge.
2. Fountain Area in middle of area
3/4. Top and Bottom Trick Ramps (See Above)
5. Small Ramp after tricks 3/4 with Item Box. Not Recommended.
DK's Snowboard Cross
A snowy track with tonnes of trick spots and halfipes. Watch out for deep snow as it slows you down drastically. Only 'Shrooms can get through it with ease!
Shortcuts: One
1. After the snowy bumps, turn right and jump off the edge. If you did it right, you should land on the other side. You'll inevitably go up the border, just turn right and you'll continue normally.
Trick Oppurtunities/Areas: Five!
1. Half-pipe after the Cannon.
2. Large boost ramp or 3 large bumps
3. Loads of small bumps with 4 small boost ramps
4. Couple of quarter pipes
5. One huge half-pipe with deep snow.
Wario's Gold Mine
Description: A track where there are many places to fall off, a heavy kart/bike is recommended. As you go downhill, you lose practically all handling, so line up before hand.
Shortcuts: One
1. When you get to the end of the moving carts, if you follow their path you can access another path with boost pads, getting you ahead.
Trick Oppurtunities: Five
1/2. Inside and outside trick spots. Inside one cuts the corner.
3. Large boost pad to cart area, unavoidable.
4. Boost pad in shortcut 1 (see above)
5. Trick pad at end/beginning of lap.
Will add more tracks soon!