Battle mode

The battle mode is a game mode of each game.

Stages
Mushroom Kingdom

Mobius

Hyrule

Cave

Center of the World

The sea (unlockable stage, you can unlock it with unlocking Spongebob Squarepants and Patrick)

Out of Mobius (unlockable stage, you can unlock it with unlocking Amy Rose and Shadow)

Subsoil (unlockable stage, you can unlock it with unlocking Wario and Waluigi)

Star stage (unlockable stage, you can unlock it with unlocking all stages)