From The Bakugan Wiki

BakuCloser (Japanese version Auto Sphere (オートスフィア, ōto Sufia?)) is a series of Bakugan with parts that will close automatically when taken off a Gate Card.

In Bakugan Dimensions, BakuClosers have unique special abilities similar to Super Assaults, due to their inability to support Battle Gear.

Bakugan Included[edit]