He's a pirate, but also a Pokémon Master.

With his eyes wide open, Gushin became a member of One Piece. Here, pirates were brutal, the navy incompetent, and the Celestial Dragons inhuman! Fortunately, every cloud has a silver lining; the Pokémon games provided him with a cheat code. As a Pokémon Master, he only needed to travel to different regions to absorb abilities and create corresponding Pokémon. Pokémon could level up by fighting monsters and even fuse with him. He easily became a Gardevoir, a psychic. He saw Snorlax, whose strength increased by constantly eating. He saw Gengar, whose body possessed its own dimension and could steal Devil Fruits! ...And there were even more pseudo-legendary and legendary Pokémon! From then on, he embarked on a path of justice that satisfied himself and the world—victory was justice! His fame resounded throughout the seas: Pirate Slayer, Shichibukai, Emperor of the Sea, Strongest Man in the World, Dragon Slayer... Years later, surrounded by numerous Pokémon and followers, Gushin shattered the Mary Geoise, the sacred land symbolizing the Celestial Dragons' supreme status! "Im is strong? Take this from my Kyogre's Origin Pulse first!"