Here's the list I would do, if I were trying to make as little change to the deck as possible.
4 Gible
1 Gabite
4 UNM Garchomp
3 Misdreavus
3 Mismagius
1 Diancie Prism
1 FLI Buzzwole
1 UNB Mew
4 Cynthia
3 Professor Elm's Lecture
2 Bill's Analysis
2 Lt. Surge's Strategy
1 Brock's Grit
4...