How to Beat King Boo in Luigis Mansion 2 HD

This is it, the final showdown between light and dark, good and evil, plumber and ghost! You will notice after defeating the Knight boss that you were unable to extract back to the safety of E Gadd's bunker. Looks like you're in for a fight. No need for a huge introduction, we have a king to dethrone! I will say that I won't be spoiling anything after this fight so you can enjoy the game.