Hey this combo is with Imposter Prof Oak's Revenge and omanyte.

    First have omanyte on your bench and use Clairvoyance.(To look at your
oppenents hand), then.... use Imposter prof Oak's revenge to see what they
got with clairvoyance and if its good use it! goodbye
Blastiose,Venusaur,Charizard,etc.!

Imposter Prof Oak's Revnge
Discard a card
from your hand in order to play this card. Your opponent shuffles his or her
hand into his or her deck, then draws  4 cards.