★ Junk Item ★ WonderSwan ONE PIECE Grand Battle Main Unit Collaboration Swan Crystal Non-sale item presented to 1000 people as a set of software + main unit in a joint prize campaign by Weekly Shonen Jump, Monthly Shonen Jump, and V Jump. I played it when I won it in the prize campaign, but I lost the battery pack. Since the operation has not been confirmed, it is treated as junk.