An Ultra Nut is an item in the Mario and Luigi series. History Mario and Luigi: Superstar Saga An Ultra Nut is used to restore HP of both of the Bros. This article is a stub. You can help Mario Wiki by expanding it. Retrieved from "https://mario.fandom.com/wiki/Ultra_Nut?oldid=219343" Categories: Stubs Items Community content is available under CC-BY-SA unless otherwise noted.