Shortcuts... OK, let me see
F8C-You kidding? none
Yoshi Falls-Take the first and third waterfalls, go around the second
CCB-Use a mushroom or two to cut through the water after the second zipper (or if you're good, you can PRB it)
Luigi mansion-none. Use a mushroom to cut throught the grass right after you exit the mansion
Desert hills-Use PRB or
two mushrooms to cut through the sand behind the pyramid, or use some mushrooms to jump off the hills at the end
Delfino Square-Use a mushroom to jump off the ledge right before the bridge to land on the dock, or use it to cut through the alley right after the two boxes.
Waluigi pinball-None
Shroom ridge-use
THREE mushrooms to cut through the grass before the tunnel
DK pass- Use a mushroom/star to cut through the snow after the sixth turn, or the eighth. At the top of the hill by the eight turn, there is an item box that has a mushroom ,three mushrooms, or a star in it always.
Tick tock clock-none. A hint is to use the wheels and jump at the top to go fast.
Mario circuit-Use a mushroom to cut through the sand to the right of the piranah plants in pipes.
Airship fortress-none
Wario stadium-Use PRB or mushrooms to cut around the big bumps. It saves a good bit of time.
Peach gardens-Use a mushroom/star to cut through the flowerbeds, mostly the one right after the start
Bowser castle-Go all around the spinning platform, and go through the red carpet room.
Rainbow road-Jump off the spiral at the beginning to land on the downward part of the track later NOTE: if you use this trick, your time is ineligble to be sent to the record boards
MC1-Use PRB or mushrooms to cut through any of the sand
MMF-none
PC-on the 2nd to last turn, cut through the grass. saves a little time
LC1-Use PRB off the starting zipper to cut through the sand by the chain chomp
DP1-Use a mushroom or PRB to cut through the grass near the bridge
FS-I'm not telling you this one...XD
BC2-None, A hint-At the part where the track splits into two, jump off the zipper, then ride on the ledge, then jump at the end. Saves a litle time
BP-You kidding? none
KB2-Use a mushroom to cut through the grass-like stuff.
CM-Use a mushroom at the jumps at the end to go faster
LC2-Use a mushroom to cut pretty much any turn
MB-Use a mushroom to cut through the dirt near the first tunnel
CI2-USe PRB to cut through the dirt gap in the first wall.
BB-Go left when you get into the building, and jump over the hole.
SG-Use a mushroom at the second wood ramp, don't bother with the first. It's just a mushroom waster. There are two shortcuts I'm not telling you in this one XD
YC-Use a mushroom right before the big 180 degree turn to jump over the water.
That's all.