woah, woah, slow down with the stage 2s lol.
You shouldn't run chesnaught, dusknoir, and serperior in the same deck with Juniper as your only real draw resource.
21 Pokemon to me is a bit excessive, here's what i'd say:
Pokemon 21
-1 quiladin
-1 snivy
-1 servine
-1 (promo royal heal) serperior...