From the Super Mario Wiki
New Super Mario Bros. Wii
Spine Coasters appear in World 8-7 from New Super Mario Bros. Wii, a stage that can be unlocked by finding the secret exit in World 8-2. It also appears in multiplayer versus mode. Spine Coasters are the only method of transportation throughout the level, and they often make risky maneuvers, passing through lava geysers and into the lava itself. Players must time their jumps to avoid coming in contact with the lava and losing a life. Spine Coasters can stand the weight of Mario, Luigi, and both Toads on it. However, if all characters perform a simultaneous ground pound, it will fall.
New Super Mario Bros. Mii
Super Mario 3D Land
Spine Coasters later appear in Super Mario 3D Land, where they are only found in World 8-Bowser's Castle 2. Their design has changed into a three-dimensional figure, and also somewhat resemble Dry Bones.
New Super Mario Bros. 2
Spine Coasters once again appear in New Super Mario Bros. 2, though they act more like Lava Lifts from Super Mario World. Two Spine Coasters appear in World 6-2, where they sail along the lava. Once a Spine Coaster has reached its stop, Mario or Luigi can ground pound its head to make it spit out a large amount of coins, or even a 1-Up Mushroom. A minor detail was added in this game: the eyes glowed every time a vocal riff was heard. Spine Coasters are also featured on Course 3 of the Platform Panic Pack in the game's downloadable Coin Rush course packs. Spine Coasters also appear in Course 3 of the Coin Challenge C DLC, although they were noticably missing the characteristic head.
New Super Mario Bros. U
In New Super Mario Bros. U, Spine Coasters appear in two levels: the Rock-Candy Mines level Thrilling Spine Coaster, a course similar to the world shown in New Super Mario Bros. Mii, and the Superstar Road course, Spine-Tingling Spine Coaster. Spine Coasters and Spine Coaster tracks also appear on the world map, and can be used to travel between Frosted Glacier and Rock-Candy Mines.
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