If I was in Dark Deception, I would trap Agatha inside a bubble.
What if she popped it or teleported out of it?
The bubble could be so strong that she can't pop or teleport out of it!

Cyndaquil: In FaCt I aM wEaK tO wAtEr. That’s why.

Agatha:Klepthemka, get me out of here RIGHT NOW!!
Me:Well cyndaquil won't be in here. You would have so much fun in your bubble!
Agatha:No, I'm not having any fun when I'm in here!
Me:Ha! You're a little girl in a big bubble!
(Agatha growls)

Cyndaquil: Not this again...