After an exhausting 11-hour battle against Charlotte Cracker, Luffy reveals a new variation of Gear Fourth called "Tankman" (Manpuku-ban or Satiety Version). This form is unique because it's achieved only after Luffy eats a massive amount of Cracker's biscuit soldiers.

The file you're referencing, "[Witanime.com] OP EP 806 FHD.mp4," is a high-definition download for , titled "The Power of Satiety! A New Gear Fourth Form - Tankman!" . Episode Guide: One Piece 806

This was notably the final episode to feature the opening theme "We Can!". Site & Safety Information

This episode is a major milestone in the :