Composed of 6 of currently most popular Shonen main characters. Originally created as The Big 6 by ~Avant~ then later changed to Power 6 by 88 Movement. Also is used as a reference to their verses as well. It should be noted that most OBDers find this term retarded.(it should be noted that those 6 vastly varies on stats with naruto himself being most likely able to solo all the remaining verses )

Naruto from Naruto
Gon from HxH
Allen from D.Gray-Man
Ichigo from Bleach
Luffy from One Piece
Tsuna from Reborn