Mega Boo

The Mega Boo is also widely known as the Big Boo. They are much larger forms of the normal Boo and will stalk you just like their smaller cousins. They tend to always appear with a group of four other normal Boos and like to chase Mario down narrow halways. Two of them can be found in the second mission of Haunty Halls Galaxy.

Defeating Mega Boos
There is not a single way to defeat a Mega Boo. However you can turn Mario Towards them and they will shy away like normal Boos. Beware, the spin trick will not work against them.