From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
Rivet (リベト, Ribeto; FUNimation "Ribet") is a member of Mega Cannon Sigma.
Rivet's Japanese name is a pun on the word Ribetto, or Rivet in English.
Along with the other mercenaries, Nezi, Natt, and Bizu, he was usually called upon by Doctor Mu for progress and results. Ribet and the others had the ability to fuse their bodies to form the Sigma Force Cannon. With the death of Natt, Ribet and the others fuse their bodies to beat Son Goku, but they are easily beaten by Goku.
- Ribet Rocket – The ability to shoot a rocket from his body.
- Super Mega Cannon Sigma – The ability to fuse with the other members of Mega Cannon Sigma into one entity.