Watch anime online, stream anime episodes for free, you are watching One Piece – Episode 12 English version online and free episodes. Anime Episode guide, Chapter One Piece – Episode 12 English Subbed Clash with the Black Cat Pirates! The Great Battle on the Slope! The episode opens with Kuro walking down a path, through the woods, to Kaya’s mansion. While he does this, Usopp, Luffy, Zoro, and Nami are formulating a plan on the slope for when the pirates come.