Personally, I like Terrakion-EX in a Vileplume deck. It can hit 2 for 50 early to do damage to Darkrais and Eels, and can attach basic energies as a form of energy acceleration. Bellossom would also be great in this deck, as it stomps on Terrakion(-EX), Keldeo-EX, and Blastoise for 1 Grass Energy.