One Piece: Season 1, Episode 138

1 - 138: Whereabouts of the Island Treasure! Attack of the Zenny Pirates!

The commotion caused by Zenii's arrival allows Nami, Sanji, Usopp, and Chopper to board their ship safely. Zenii and his goats get on the navy ship and Zenii uses of his martial arts skills, with a counting frame to fight. Luffy attempts to slingshot himself over to help him, but lands in the water instead. Zoro immediately jumps in after him to rescue the non-swimmer, only to be run over by the Straw Hats' own ship. The marines are eventually defeated, but a fleet of nine more ships is still waiting in the fog surrounding the island. Zenii tells the Straw Hats that, on his arrival on the island, the goats ate all of his money and that they became his treasure instead. The Straw Hats give Zenii enough medicine to survive and leave the island, escaping from the navy.