Its a good card but it is all too true that there are numerous ways to counter it but if i were to put it in a deck i would definitley combo it with energy-retrieving trainers like power tree or energy restore
I have three such Gengars and one Gengar Ex and i was wondering if any of you guys have any suggestions as to what other 3-step or 2-step teams i should add on to the Gengar dynasty to complete such a deck...thanks