For playing a long time mewperior last year, I think you must drive your deck with 3 gengar.
If you start with gengar in prizes and hand, you need another one to use mew's see off during your first turn.
Why do you want to play dialga lv.X? With this pokemon, you lose the vespiqueen's pokebodies!!! Same for shaymin lv.X!![hr]
Why do you want to play dialga G lv.X? With this pokemon, you lose the vespiqueen's pokebodies!!! Same for shaymin lv.X!!