Re: In Theory, Kakuzu could.....
it doesn't work like that. to create something like wood release, you need to be able to combine the chakra structure and the molecules, not the element itself. Because if you throw a rock on a lake, it wouldn't turn into a tree lol.
He just makes combos, a fire blast and wind blast. The molecules and chakra structure don't combine and become a whole new element. The oxygen just feeds the fire and the wind strengthens it and makes it stronger and bigger.
or else many many many ppl would have kekkei genkais.
because according to what you say, if kakahsi creates a clone he could create wood release, because with one clone he'll make a water dragon and the other one an earth dragonan and together they become a wood dragon... no no.. doens't work like that