You shall weep. This I swear.
Take Damned the Yamask.
Hell. That is what this existence is. Nothing but hell. Demons around every corner, hoping to capture your soul in a small orb.
That's the life of a Yamask.
Your Yamask, like others, is a human soul chained to a Pokemon form. Naturally, it is angry about this. Teach it Frustration and it must use it at the beginning of each battle. Damned wants to bring others to suffer the tortures of Hell as well. As such, it must use Curse immediately after Frustration, regardless of its HP. Also, in order to evolve, it must be alive while KOing 10 opposing Trainer-owned Pokemon with Curse damage. It was punished for using arcane arts, and when it evolves, it holds on to those sins. When evolved, it must use Will-O-Wisp at the beginning of each battle, and then Hex.
Oh, and he must face up to the Prince of Darkness for his crimes...Whether he evolves or not, solo Grimsley.
Have fun...if you dare.
CAP ASB Team
Pwnemon: i was raped by my left hand once
<Ditto> It's not racism if I don't consider them people