One flaw in this. The Shaymin in question is nearly five times lower leveled. I'm sorry, but I just don't see it doing that much damage. It would be more like this:
KA-BLAM!
Ouch! That really hurt!
I win?
Not yet.
Okay, I'll just use Magical Leaf! :D
What the crap was that! *Signal Beam*
Guagh @-@
I pwn your soul!
That's more like how it would go. :P