So instead would this be legal?
I use Cosmic Power. I have 6 cards in Hand. I Bottom-deck 2 cards. I have another hand of 6 Cards. I play one card, say a Trainer or Energy for the turn, I then use Telepass or Telekenisis to use Steven's Advice. Because I have 5 Cards in hand, I can get "n" amount of cards equaling Opponent's pkmn in play.
Would that be legal?