The stage consists of two main platforms; the larger flat main one on the left and a smaller raised platform to ther right. There is a large gap between the two. The captured Mii works as a destroy-able platform that swings with hits.
Occasionally, the Dark Emperor appears on the stage or in the background. While he is off the stage, he can provide an upgrade or downgrade to all characters of a specific color costume. This is detailed in a notification on the lower screen. On the stage, he moves around the stage, damaging players who touch him. He will go away if he takes enough damage or the caged Mii is set free. Players who defeat him get a stat boost. If he leaves on his own, he can sink one of the platforms into the abyss