The battle takes place in the gardens instead of the castle's roof like in Super Smash Bros. Melee. The player can get down to a second plain that has a warp pipe and pond of water. There are blocks from Super Mario World in this stage that the player can jump onto, but it is very tricky.
The music track is an incomplete rendition of Princess Peach's Castle, an orchestral remix of the ground and underground themes from Super Mario Bros., ripped straight from Super Smash Bros. Melee.
Peach's Castle appears as the second level of Adventure mode after completing Super Mario World. The player is pitched on a 2 vs. 1 match where they have to defeat two Marios, with each character having one stock.
Peach's Castle first made an appearance in Super Mario 64, serving as a central hub for the game. After that, the castle began to frequently appear throughout the Mario series, serving as a landmark in the Mushroom Kingdom that is resided by Princess Peach and her servants, the Toads.