Water Pokemon Master here, and we have just gotten a "leak" from a reliable source. He says that there is going to be a new HM called Ride. This is what allows you to ride on your Pokemon (ex. Gogoat, Rhyhorn). The Pokemon that you "borrow" have already been taught the HM. I am not going to update the site just quite yet. That is all for now, I shall keep you guys updated!