Mario Kart Wii/Banana Cup

GBA Shy Guy Beach
At the start you will hopefully notice that there is a ship and it fires mortars all over the place. However, these don't go off immediately and you will have some time to avoid them before they explode. When you get to all the mini islands, place bananas on them so that if the other racers try and cross the islands (and they will), then they will be slowed down.

DS Delfino Square
The exact same as the D.S. The only way you can do a mid air trick is on the drawbridge.