If we're talking Mario power-ups, it'd be disrespectful to not ... Nintendo fan never shuts up about the Blue Shell from New ...

but New Super Mario Bros. turned it into a mainline power-up. The last time it was seen was in Super Mario 3D World, where it showed its potential with 3D gameplay, especially if it were to return ...

New Super Mario Bros ... NSMBU Deluxe is a Mario game where you zip from level to level on a colorful world map that pulses with activity. You store power-ups in a private stash for later use.