Bowser Nightmare is the seventh and final board of the game Mario Party 5
. It can be played in Party Mode once you beat the game. This is Bowser
's fourth board in the series. When playing in Story Mode, you'll be facing off against three Koopa Kids
and if successful, then you'll face Bowser in the final minigame, Frightmare. If you defeat the Koopa King, then the gameboard will become playable in Party Mode. This is the largest board of the game and along the way, you'll encounter many traps, and have a walk with the Koopa King.