Nabbit (トッテン, Totten) is a rabbit-like thief from the Mario universe.
Nabbit originates from New Super Mario Bros. U. After completing some levels, a Toad asks the players to retrieve the items Nabbit has stolen from a Toad House. Nabbit then appears in a specific level, and players have the option to try and catch him: he quickly runs across the stage, and if players catch him by the 100-second time limit they will be rewarded by Toad with a P-Acorn. If players fail to catch him three times, Nabbit flees and disappears until the conditions are met once more. Additionally, if the player waits after defeating all the enemies in an Enemy Course, and does not grab the power-up they receive as a reward, Nabbit will come in and swipe it.
Nabbit reappears in New Super Luigi U, reprising his role from the vanilla game. This time he is also a new playable character, replacing Mario's role from the original game. Unlike other playable characters, Nabbit cannot use power-ups, as any power-ups he collects are converted into 1-Ups at the end of the level. He also cannot ride Yoshis, or grab objects or other players. However, he is immune to damage from all enemy attacks (though he can still get knocked back by tougher enemies) and general hazards, with the exception of falling into lava or poison, getting crushed by certain obstacles, running out of time, or falling into a pit.
As a stage element
Nabbit appears as a stage hazard on the Mushroom Kingdom U stage. He can appear when the stage transforms; while on the stage, he chases fighters, trying to catch them with his bag. Once a fighter is caught, he attempts to blast off in a trail of smoke towards the upper blast line, much like the Beetle and Boss Galaga items. Nabbit is treated as a fighter, and therefore is vulnerable to attacks, grabs, and items, and like regular fighters, he can be knocked back further the more he has been damaged. He can be Inhaled by Kirby, but doing so provides no copy ability, and he will instead turn into a star and take medium knockback.
In Smash Tour
Nabbit appears as a random event in Smash Tour. He moves along the map picking up any item he comes across, and whoever bumps into him retrieves his whole loot.
Nabbit returns as a hazard on Mushroom Kingdom U. In addition, he now has a Spirit summoned using the cores of Duster (a fellow thief) and any Support Spirit.