The title of this article is official, but it comes from a non-English source. If an official name from an English source is found that is not from the English Super Mario Bros. Encyclopedia, the article should be moved to its appropriate title.
3UP Mario is a form Mario assumes in Super Mario-Kun. It is gained when Mario collects a 3-Up Moon, which grants him this form rather than granting him three extra lives as in Super Mario World.
In this form, Mario gains a crescent moon on his cap, which he can detach and throw at enemies like a boomerang.