The Gengar Fruit User in the World of One Piece

A college student transmigrates into the world of One Piece, becoming a sixteen-year-old boy with a Devil Fruit from the start.

After eating the Devil Fruit, the boy can transform into Gengar. That's right, the one from the Pokemon world.

Able to transform into Gengar, the boy sets out on an adventure all his own in this perilous world...