One Piece Episode 519 -

: Chopper eventually runs into the real Nami and Usopp, finally realizing he was following imposters.

: Chopper continues to follow the Fake Straw Hat Pirates, believing they are his actual friends despite their vastly different appearances and cruel behavior. One Piece Episode 519

Everything that's holy, this is beyond infuriating. (Spoiler for ep 519) : Chopper eventually runs into the real Nami

: The Navy begins to mobilize after hearing reports of the "Straw Hats" gathering at Grove 46, unaware that most are actually the imposter crew led by "Three-Tongued" Demalo Black. Episode Details One Piece Episode 519