Backward shell hyperspeed
Backwards Shell Hyperspeed is a method of attaining Hyperspeed whereby Mario rides on a shell on certain steep slopes to increase his backwards speed. This technique can be used multiple times in a row on one or more slopes to further increase Mario's speed.
While riding on a shell, move Mario to a steep slope. Angle Mario parallel to the slope and observe that Mario will begin moving backwards while gaining speed. Once the slope runs out, one can repeat this process on the same slope or a different slope to continually gain speed.
- A Button Challenge - Shell Hyperspeed is used for Shoot to the Island in the Sky 0xA, Find the 8 Red Coins 0xA, Mario Wings to the Sky 0xA, Behind Chain Chomp's Gate 0xA, and Snowman's Big Head 0xA. It was formerly used for In the Deep Freeze as well, although that strategy has been obsoleted.
- No Buttons Allowed Challenge - Shell Hyperspeed is used in Find the 8 Red Coins, Behind Chain Chomp's Gate, BoB 100 Coins, Snowman's Big Head, and In the Deep Freeze.