Sigma Force Cannon

The Sigma Force Cannon (スーパーΣ（シグマ）, SūpāΣ [shiguma]) is the fusion of the Machine Mutant robots Nezi, Ribet and Bizu. With the death of Natt, the others Sigma Force fuse to become the Sigma Force Cannon when trying to defeat Goku. It may seem to have Goku worried, but in reality Goku was holding back, trying to figure out Sigma Force's moves and fighting style like they did with him. He then went to his full power and defeated them effortlessly.

The Sigma Force Cannon appears as a boss battle in Dragon Ball GT: Transformation.





















Information from:
http://dragonball.wikia.com/
Information picture :
http://tekilazo.deviantart.com/