
Chapter 188 of One Piece, Okama Kenpo, has Chaka agree to wreck the palace for Vivi's sake while Sanji unravels the flaws in Mr. 2's fighting style and lures the okama back to his true face for a finishing kick.
The royal soldiers balk at the princess's wish to demolish a castle four thousand years old, but Chaka, after a moment's hesitation, bows and orders that Vivi's every command be obeyed, judging the kingdom's people worth more than its stones. In the South Block, Mr. 2 wears Nami's face as he pins a beaten Sanji, taunting that the cook is weaker than his boasts. Sanji reminds himself the foe is an okama underneath and warns him not to get cocky, yet melts again the instant he sees Nami's features.
Mr. 2 strips off his clothes complaining of the heat, and Sanji, ever the gentleman, offers help before being knocked back by Okama Kenpo. Each time Sanji winds up to strike, the agent flips back to Nami's face to freeze him.
After a Mascara Boomerang, Mr. 2 moves to finish the fight, but reverts to his own face first, and Sanji seizes the opening to kick him away. Sanji spells out the flaw: the okama cannot perform Okama Kenpo while impersonating Nami, and must touch his face with his left hand to change back. Mr. 2 counters with his piercing Prima attack, which bores a clean hole through a wall, and Sanji spots its weakness as he dodges. When the agent shifts into Nami once more, Sanji tells him there is something on his left cheek; Mr. 2 instinctively touches it with his left hand, reverting himself, and Sanji lands a Veau Shot.
The chapter lays bare the dual weaknesses of the duel: Sanji is helpless against Nami's likeness, while Mr. 2 cannot fight in disguise and reverts at a left-cheek touch. The cover continues Hatchan's Sea-Floor Stroll, the recovered castaway gifting Hatchan a ring as a parting thanks.

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Okama Kenpo is the fighting style Mr. 2 Bon Kurei uses against Sanji, and Chapter 188 reveals its key flaw: the okama cannot perform it while disguised as someone else, since copying a face costs him his own martial art form.
Sanji is helpless against Nami's face; every time Mr. 2 shifts into her likeness with the Mane Mane no Mi, Sanji melts with infatuation and cannot bring himself to strike back.
Sanji realizes Mr. 2 must touch his own left cheek with his left hand to revert from Nami's face, so he tricks the agent into doing so mid-fight and lands a finishing Veau Shot.
Chaka hesitates only briefly before bowing to Vivi's wish to demolish the four-thousand-year-old palace, judging that Arabasta's people matter more than its ancient stones.
The cover continues Hatchan's Sea-Floor Stroll, with the castaway Hatchan helped earlier gifting him a ring as thanks before they part ways.
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