私は私の高い性欲のためにちょうど1人の女の子にほしい、私達は一緒に #masturbation を作ってもいい

So, absolutely nothing until level 15 means the only way to level it up would be to send it out into battle, switch over to another Pokemon, and have that Pokemon win, in which case the experience would be split between the two.

It's just... you're better off waiting on this one if you want to raise it.