Arc 18Punk Hazard’s Poisonous Trap
The Straw Hats uncovered Caesar Clown’s experiments on children and fought to escape Punk Hazard as he unleashed his island-destroying weapon. Law formed an alliance with Luffy against Kaido, and the rescued prisoners began confronting Caesar while Xi Yan’s group rushed toward the laboratory to save Momonosuke.
- Kin'emon and the Straw Hats searched for Momonosuke, while Caesar began targeting the crew and using candy to keep his experimental children dependent on drugs.
- Chopper exposed Caesar’s experiments, and the Straw Hats resolved to rescue the children as giant children attacked and Nami, Chopper, and Perona stayed behind to protect them.
- Shakky told Xi Yan about Blackbeard’s rise, Jozu’s death, and the danger posed by Devil Fruit hunters, while Xi Yan’s group learned Caesar was behind Punk Hazard’s experiments.
- Locke and Scotch captured Perona as bait, but Luffy and Merry rescued her with Law’s help, and Luffy agreed to Law’s alliance against Kaido.
- Law restored the crew’s original bodies and warned Luffy that capturing Caesar would commit them to a dangerous plan, while Kin'emon reunited with his body and headed for the laboratory to rescue Momonosuke.
- Caesar revealed Death Country and attacked Luffy’s group, but Luffy and Perona fought back before Caesar removed the air and captured them with Sea Stone chains.
- Caesar released the poisonous Death Country weapon and exposed that Vergo and Monet were working for Doflamingo, while Xi Yan carried his group away on a Wood Dragon.
- Robin created smoke to distract the Marines, and Law revealed that he and Robin had escaped their restraints and freed the others before Luffy charged into the research facility.