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Snake Blocks are blocks usually found in castle-type levels. They first appeared in Super Mario World, and re-appear in Super Mario Advance 4: Super Mario Bros. 3, the New Super Mario Bros. games, and Super Mario Galaxy 2. In all games, they are a set of blocks that start out as a normal platform and begin to move like a snake when stepped on by Mario or Luigi. They resemble normal Used Blocks in Super Mario World, but resemble Rotating Blocks in Super Mario Advance 4: Super Mario Bros. 3, and are bright green in the New Super Mario Bros. games and pink in Super Mario Galaxy 2. Snake Blocks track across the screen, turning left, right up or down as they follow a pre-determined course over obstacles such as a wide pool of lava, a bed of spikes, or a bottomless pit. Mario must continue to move and follow it when on these blocks, otherwise they will keep moving under Mario's feet, and he may possibly fall off.
Snake blocks get their name from the classic arcade game Snake, in which the player controls a sequence dots that resemble the snake animal.
The Snake Blocks in Super Mario Galaxy 2 appear in the Boo Moon Galaxy, Bowser's Lava Lair, and Bowser's Galaxy Generator. In this game, they make their only 3D appearance, though they are used in the same way. It is first shown here that they can be of varying widths, instead of only one block wide, as in its previous 2D side-scrolling appearances.
In Super Mario 3D Land, Flip Panels appear in some levels, with similar functions.
A similar Snake Block called the Ice Snake Block appears in New Super Mario Bros. Wii. It is found in World 3's Castle, but unlike regular Snake Blocks, its icy surface is slippery, though the Penguin Suit can remedy this fact.
Snake Blocks reappear in various levels in New Super Mario Bros. 2, where they get the same appearance they have in New Super Mario Bros.. This is the first time they are seen moving on their own. Also, this is the first time that they are not only used as platforms to cross gaps, but also as obstacles, especially in World 1-Tower. They are much more common in this game compared to the previous New Super Mario Bros. games.
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