Warp Pipes are pipes in New Super Mario Bros. Wii. They are in the four primary colors. When Mario goes through them (press the down button on control stick) he will go through them. Warp Pipes usually lead to an underground place. Various items can be in Warp Pipes- Coins, P-Switches, Star Coins, even enemies! All Warp Pipes have another Warp Pipe, Mario must go through to get out of there. This time he must jump up (press 2 and up on control stick) to get back outside. The Green and Yellow Pipes are more common than Red and Blue. Greens are usually the entrances. Yellows are the exits. It is good to go through a Warp Pipe, because you never know what could be in there. It could be something helpful, hurtful, or even both.