Super Bell

The Super Bell is an item introduced in the game for the Wii U, Super Mario 3D World. It is a golden striped bell with beady eyes. When obtained, Mario, Luigi, Princess Peach, Toad, Bowser, or Rosalina will transform into their cat form, which allows them to slide into enemies, pounce in midair, and climb up walls and Goal Poles. There is also another power up called the Lucky Bell, which turns Mario again into his Cat form, but when he ground pounds, he turns into an invincible Lucky Cat statue and earns bonus coins while falling.

Super Bells are first seen during the game's prologue scene, where they are flung out of the Clear Pipe leading to the Sprixie Kingdom, along with many other items such as POW Blocks and Double Cherries. Super Bells can be seen again in Captain Toad: Treasure Tracker, since the same scene plays at the end; however, the items are not obtainable in the main game. In Mario Kart 8, the Super Bell is referenced as a racing cup called the Bell Cup and as a track called Super Bell Subway as a part of the Animal Crossing × Mario Kart 8 downloadable content pack for 2015.

Trivia

 * Super Bells look very similar to the bells seen at the end of stages in Super Mario Land.