- Accessories: advanced rifle, combat knife, smack (left)
Proto I (プロト・I Puroto Aai?) is Jack Gelato's personal customized LBX and prototype for it future sucessors in Danball Senki W.
It was an untested experimental prototype developed by Junichirou Yamano, back when he was a Tiny Orbit engineer. But was left incomplete due to the fact any AI during its development stages where incompatitable with its high performance capabilities. Its standard capability is it Multi-Dimensional Joints, a special mobility mechanism where its core joints are rotatable to any angle for instant reactions and quick counters.