One Piece: Let's go Luffy

Having transmigrated to the world of One Piece, he gained the cheat code to enter the Pokémon game. He thought he could summon Pikachu, Bulbasaur, and Charizard to wreak havoc in the One Piece world. But the protagonist, upon entering the game, was utterly shocked: "Luffy!? Why are you in my Pokémon list?!" ... — Description from novelcodex.org