New Super Mario Bros. Wii
is a 2011 Japan-only arcade game developed by Capcom. The gameplay features multiplayer like its console counterpart, and is based primarily on a slot-machine mechanic. The game features a variety of "event" elements, each based upon gameplay from "New Super Mario Bros. Wii". Winning various events and on the slot machine gives players opportunities to collect keys. Once five keys are collected, the player enters an event with Bowser to win a jackpot.