You defeat the boo by sneaking up on him by the back and hit him.
Run behind it and attack by punching or diving several times.
ITS HARD KINDA BUT I BEAT HIM RULES LISTEN : 1:get in the cage. 2:go in the tiny room. 3 : don't get by fire. 4:then attack
you cant unless you a a gameshark with the code
Hit big boo 2 times with Mario and in the mirror with luigi hit him only once.Good luck!
Punch him in the back 3 times.
Super Mario 64 DS Unlockable: LuigiAfter unlocking the red ! boxes, go to the castle courtyard. Punch the giant boo with the cage inside of him to enter Big Boo's Haunt. Obtain the first star by defeating all the Boos to get the staircase. In the second goal, as Mario, go up the stars and into the room with the single bookshelf. Use the fire flower to float up to the room above, where you'll find a Luigi painting. Jump through the painting and defeat Big Boo to get Luigi's key.
Defeat all the Boos, and when the Big Boo appears, knock him out and the stairs will rise.
Are you talking about Super Mario 64 ds I have got to know
OK. To be Wario on Mario 64 DS you have to find Luigi(In the big boo world found in the courtyard)and then use him to go inside the invisible mirror on the upstairs room. Then the picture outside the mirror is Luigi but inside the mirror it is Wario. Hop inside and work your way to Chief Chilly. Defeat him and you get Wario! To be Mario, you have to defeat King Goomba in the 8-star room as Yoshi. You can get Mario very easily.
kill all the other boos by ground pounding on their heads
You will have to defeat Bowser in the Dark World...then go downstairs to where the Big Boo was...& look behind you to find a door. Inside, look for a door with a star on it & the portal there will take you to Hazy Maze!
Yes Mario can become a boo in the game super Mario galaxy. When you get a boo mushroom.