9 titles recommended if you like One Piece: Defeat the Pirate Ganzack!
One Piece: Curse of the Sacred Sword
One Piece: Baron Omatsuri and the Secret Island
One Piece: Clockwork Island Adventure
One Piece "3D2Y": Overcome Ace's Death! Luffy's Vow to his Friends
One Piece: Chopper's Kingdom in the Strange Animal Island
One Piece Episode of Nami: Tears of a Navigator and the Bonds of Friends
One Piece: Dead End Adventure
One Piece: The Movie
One Piece Film: GOLD