Editing Adventure Mode: The Subspace Emissary

|colspan=2|An enormous labyrinth of sections of previous levels haphazardly connected to each other by doors, brought together by the [[#Subspace Bomb|Subspace Bomb]] explosions and [[#Tabuu (character)|Tabuu]]'s power. To face Tabuu, rematches must be taken against the game's large bosses, as well as fake versions of the various characters, all scattered in odd places across the maze, marked by shadowy energy emanating from the doors leading to them. The maze is so large and time-consuming that it has Save Points (which also restore life and allow characters and stickers to be reselected) and Warp Points scattered throughout, while a map appears when the level is paused, adding indicators to remaining battles once a full loop around the maze has been made; it is the only stage with these features. Once Tabuu is faced, he attempts his devastating attack again, only to be interrupted and crippled by [[Sonic]], who joins the heroes for the final battle. Once Tabuu is defeated, all the Subspace explosions cave in on themselves and restore the land to its origin. The [[#Island of the Ancients|Island of the Ancients]], however, remains destroyed due to the amount of bombs deployed at once on it; a glowing X remains in the sky where it once floated.