First you need to go through the areas looking for doors with a black aura surrounding it inside are evil characters or bosses defeat them until you go all the way around back to the midair stadium go to the pause menu to bring up a map it will show boss faces showing what you have missed once your are done defeating all the bosses and characters go to either the battlefield fortress area or the kongo jungle level each bring you to a room where the final boss is: Tabuu. Defeat him to finish the subspace emissary!
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I think you must defeat every shadow character and boss in The Great Maze.
After you defeat most characters/bosses in the great maze through the shadow doors you'll see demon faces on your map. The demon faces represent the characters/bosses you have to defeat to get to Tabuu. After all the demon faces are gone, go to the save portal on the top right of your map. Then go through the bottom left door then go all the way to the left until you see a purple arrow pointing at a door. Go through the door & you'll see Tabuu's door with no trophies. Go through Tabuu's door & you'll see Sonic & will be able to fight Tabuu. Defeat Tabuu to complete The Great Maze.
yes because when your defeat their boss the boss's trophey dissapears.you can use your map to find the bosses
in the great maze, when you press + or start. there are many different bowser heads in different locations, they are the different bosses you've fought and all of the brawl characters on the subspace emissary. when done with that, you go to the place that looks like the jungle to the purple arrow and enter the big door to fight tabuu and once you defeat him, you win.
You get to the Middle of the maze and go against the dude with the wings.