Originally Posted by buta
Yeah, you need 4 people for the trees in the boss room to (occasionally T_T) drop map boxes. It's an easier way of getting map pieces than buying loads of Gift Box of Star or waiting a week and getting only 1.
It's 3 actually, but I think there's a higher chance to get a map box in a 4 person party. For tree's ''razor leaf'' when I was in front of him I found out, before he shoots leaves he hits you and knocks you down O_o [if you're close to his front]