One Piece, Vol. 13: It's All Right!

Zoro and Luffy defeat/kill Baroque Works agents, Mr.5 and Ms. Valentine.
Vivi's identity is revealed! Igaram is apparently killed by Ms. All Sunday (Robin💕)
Luffy and Zoro battle each other over a misunderstanding.
They reach their second island in the Grand Line Little Garden full of dinosaurs and they meet Broggy and Dorry.