The Pacifista are human weapons developed by Marine head scientist, Dr. Vegapunk. They are cyborgs built in the mold of the Shichibukai Bartholomew Kuma, who was the cyborg prototype for the project.
PX-0 (Bartholomew Kuma): Fought in the war. After the war, he protected the Thousand Sunny for two years and departed after Franky showed up.
PX-1: Appeared at Sabaody. Sent to an unknown location by Bartholomew Kuma.
PX-4: (Destroyed) Appeared at Sabaody. It was destroyed by the Straw Hat Pirates.
PX-5: (Destroyed) First seen appearing behind Sentomaru at the new G1 base after the timeskip. It was destroyed by Luffy at Sabaody.
PX-7: (Destroyed) First seen appearing behind Sentomaru at the new G1 base after the timeskip. It was destroyed by Zoro and Sanji at Sabaody.
Two unidentified units appear at Sabaody Archipelago before the timeskip. One fought the Kid and Heart Pirates, and the resulting battle has yet to be shown although the Kid and the Heart Pirateshave survived, and the other, alongside Kizaru, fought Urouge, X Drake, Basil Hawkins, andScratchmen Apoo, which the two defeated and left for dead, although all the pirates survived.
Twenty unidentified units at Marine HQ, not including Kuma himself. Several destroyed collectively by the Whitebeard Pirates, their New World allies, and Boa Hancock.
PX-Z (Shiro Kuma): A different model of Pacifista that serves as the battle unit of the Neo Marines.