Meth Bell is the elite unit compose entirely of A.I driven MS created by General Revil as an answer to Chimera Corps. While the unit record and effectiveness is unquestionable. No one in the army cannot keep themselves from chuckles everytime they heard the name.
They're black-ops squad specialized in attacking and capture vital enemy base that are heavily guarded, causing the main force to relocated troop to said base, thinning out their forces but that is just one of their mission.
RX-78-XX Gundam Pixie
RX-78-8 Over Gundam