Well, the show depicts a card game where monsters actually come out of the cards and attack and you see the entire backstory behind the card game
Getting Pokmon cards graded through PSA or Beckett is worth it for vintage holos, first-edition cards, and any card worth over $50 raw, since graded copies consistently sell for significantly more
While this may be limited by the amount of mana you have, cards like Hooting Mandrills or Tolarian Terror can be played for a single mana in the right conditions, maximizing this powerful Bant commanders potential
Conversely, if your key cards are all cheap, you can run a very lean, aggressive deck
Zapdos is the wall you put up when Pikachu EX is setting up and with only 1 retreat cost (the least of the Birds), its easy to switch out
But you could also add the newer Demolition Field and the on theme but slightly worse Field of Ruin