Mt. Magmageddon is a dungeon in Dragon Quest V: Hand of the Heavenly Bride and a board in Fortune Street.
Mt. Magmageddon appears as a playable board in Fortune Street. In Easy Mode, the board is made up of three intersecting ovals with another island in the bottom right, if someone lands on the switch square then the top left island become inaccessible, and the bottom right island becomes accessible. If another switch square is landed on again then the board reverts back to how it was when the game started. In Standard Mode, the board is made of three intersecting triangles and a rectangle, if a switch square is landed on then all of the islands separate from each other and the only was to get to another island is to land on a Backstreet square, a Magmalice square or to land on another switch square which put all the islands back together again. In Tour Mode, the player has to get at least second against Alena, Bianca and Princessa to beat the board.