This is just a concept of a Ditto x Reuniclus fusion OC I've had in mind for some time now.
He can shapeshift the gel around his body like Ditto, but he can't change his DNA or appearance. He can also move the cells around his body however he wants, allowing him to create structures for the gel's shapes, making it even stronger.
I still don't have a name, though I'm think about just calling him Reunitto, with Nitto as a nickname, but that may change in the future.