Dodge the following shells by performing the corresponding maneuvers:

SHELL - HOW TO DODGE
Blue shells - Use any type of mushroom when the blue shell begins to rise over you.
Green shells - If the shell is coming straight at you then equip a banana behind you. If it is coming from an angle then use the three shell weapon. Red or blue shells will also protect you.
Red shells - Equip a banana behind you to block a red shell from hitting you.