The other cards featured were Wartortle, Kabuto, Pikachu, Dark Charmeleon, Misty's Psyduck, and Brock's Vulpix. Articuno's ...

This might seem obvious, but you’ll need Charmander and Charmeleon cards so that you can evolve them into Charizard ex. Besides those two, Moltres ex is essential to any Charizard ex deck.