Mushroom Kingdom (いにしえの王国, Ancient Kingdom) is the only unlockable VS. Mode stage in Super Smash Bros., and is not available in any other Smash game, although there's the graphically similar stage Mushroom Kingdom in Super Smash Bros. Melee. This stage is unlocked by clearing 1P Game with the eight original characters and by playing on every already playable stages in VS. Mode. This stage is the only one which is never seen in 1-Player mode. Even if this stage is unlocked, Mario and Luigi will still be fought on Peach's Castle.