When you get to the part where you Dodge crystals the door will be at the bottom in mid air go in and Wolf O Donnel will appear beat him to unlock him but you must beat the subspace emissary to do this.
It won't appear untill after you beat Tabuu. After that, it's one of the first doors in plain sight. There is a helpful video on YouTube showing you exactly where it is.
you defeat all of the shadow characters and bosses
The fastest way to get Wolf is to enter the hidden door in "The Ruins" area, after completing The Subspace Emissary.
You get pass it by fighting, looking in doors, and finding the shining door.
go though all shadow doors then do to the door that leads to tabu
That means that you have to trek all the way to the huge door part and go through them.
you have to do 350 battles. Finish the subspace emissary mode then go to the swamp level find a secret door in the area after giant diddy then defeat jigglypuff.
450 brawls, or go to Ruins after beating SSE and skip the first door on the way down the spikes
If you mean the ones in the Subspace Emmisary, you have to stand in front of the door and press up. Only player 1 can do this
By pressing up, or going up. You cannot do this if you aren't 1st player. You also may have to press the attack button.
Its a door that leads to a character you must beat.
in thed subspace emisary theirs a secret door in the stage were you first meet falco enter that door and fight jigglypuff and if you win you get her as a character Or 350 matches in brawl
You get Jigglypuff after completing the Subspace Emissionary, and then afterwards redo "The Swamp" stage and a door should be visible near a barrel launcher. Enter the door to battle Jigglypuff.