Gengar Fruit Power Users in One Piece World

A college student traveled to the world of "One Piece" and became a sixteen-year-old boy with a Devil Fruit. After eating the Devil Fruit, the boy can transform into Gengar. That's right, it's the Gengar in the Pokémon world. The young man who can transform into Gengar embarks on his own adventure in this world full of crises and risks...