Bizu

Bizu is a Machine Mutant created by Dr. Myuu and part of the Sigma Force. His original name is derived from 'vice', a piece of construction hardware which was dubbed as 'Bizu' for the English release of Dragon Ball GT.
Bizu is the Machine Mutant invention of Dr. Myuu, a Machine Mutant himself. He, along with Commander Nezi, Natt, and Ribet make up the Sigma Force, who are called upon whenever Myuu demands "results." Bizu and his comrades have the ability to join their metal bodies into an even more powerful soldier, the Super Mega Cannon Sigma.

Even after joining their bodies, Bizu and the others members of the Sigma Force are beaten by Goku (excluding Natt, who is beaten by Pan).
















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