Perfect Clima-Tact, One Piece Wiki

The Perfect Clima-Tact is the second upgraded form of Nami's Bō. After the events in Skypiea, Usopp upgraded the Clima-Tact into the Perfect Clima-Tact, which was first introduced when Nami and crew were trying to catch up to the Puffing Tom with the Rocketman. With a better knowledge of Nami's preferences and a handful of Dials to spare, he changed the Clima-Tact from a party toy with a few combat capabilities into a lethal weapon capable of amazing weather powers that only Nami could unleash.

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