How do I beat King Boo in Luigi's Mansion?

Answer 1

once bowser tosses spiked bombs at you,use the vacume and suck up one of them.then when bowser is trying to suck you up or spit fire at you,release the vacume button.then king boo fly's out,suck up king boo.keep doing this until you suck up king boo and get his crown.

Answer 2

I have also had trouble doing this. You must first wait until he shoots a spike ball. When he does, pick it up with the vacuum and shoot the spike ball at him. Then I think he flies out and has 300 health. Start sucking up like a normal boo and repeat this process until he is dead and you get his crown gem and save Mario.

Answer 3

use the fire medal and blow the fire on the butlers candles he will run into a room and sit on the candle that's your Q to suck him up :)

Answer 4

move away from him then wait till he yawns

Answer 5

when kingboo sucks you up he goes into bowser. how to deafet him is when he shoots the firey blow up balls suck it up and shoot it at him. :)

Answer 6

You need to hit the sand bag towards him, which will in turn stun him, allowing you to vacuum him up.