From the Super Mario Wiki
Only appearing in Mario Party 4, the Super Mega Mushroom is an item that turns its user into a giant-sized version of themselves, similar to the normal Mega Mushroom. The only difference between this item and the Mega Mushroom is that the player rolled three Dice Blocks instead of two, which very similar to Golden Mushrooms in most of other Mario Party games. If you get the same number on all three Dice Blocks you get 30, 50, or 100 coins.
Super Mega Mushrooms can be gained during the minigames on the board, the Lottery Shop, or through the Item Shops. Unlike normal Mega Mushrooms, they cannot be found on a Mushroom Space.
Names in Other Languages
||Super Méga Champi
||Super Mega Shroom