Rate my Pokemon Grass Deck plz!?

Eeeeh, it is a start. You should loose the BW 5 Serperior and make then all BW 6. Also get Reuniclus for damage swap, and mixed in with Serperior's ability will be great. Get rid of some energy and add more trainers or supporters. Get rid of Tropius, if you are really worried about finding pokemon, use more Sunflora. Hmm, well that is my suggestions.