The 1-Up Mushroom is a green mushroom normally found through out all of Nintendo's Mario series. It gives you one extra life when you pick it up.
In M.U.G.E.N, the 1-Up Mushroom has been made by MatsudaSpecial.
1-Up Mushroom is a spriteswap of Green Devil and it only works in M.U.G.E.N 1.0. It can appear on stage and bump into the opponent, causing an instant one hit K.O., though this can be parried. Matches against it can take a while, so it acts more like a bonus character if anything. It appears to be closely based on Super Mario 64, as it spawns on-screen the same way, and even losing to it is like losing a life in the game, which is ironic considering its role.
Hovering the mouse cursor over the Command Input icons will display text that refers to the inputs set in M.U.G.E.N's Key Config.
Icons encased in square brackets [ ] require the respective button(s) to be held down. Hovering the mouse cursor over the icon displays the hold duration if applicable.