One Piece

Season 11, Episode 403

Episode Title: An Even Stronger Enemy Appears! The Battle Axe-Carrying Sentomaru

Air Date: 2009-05-31

Overview:

Luffy and the Straw Hats narrowly defeat a robot that resembles one of the Seven Warlords of the Sea. But before the dust settles on the field of battle, a far deadlier foe comes looking for a fight.