Your decks need to be able to do those things. Based on the bolded sections here, the play experience they are looking to cultivate is wildly different from my own ideal game
Magmar (Fossil) Strange proportions and an awkward, hunched pose plague this Fire-type Basic Pokmon card
The most important factors are edition (1st Edition, Shadowless, Unlimited), condition (mint cards command premiums), rarity (holographic, secret rare, full art), age (vintage Base Set cards are highly sought after), and the Pokemon itself (Charizard, Pikachu, and fan favorites are worth more)
Lurantis ex #096 UR Loading
At the time of writing, the Starmie ex deck is one the best you can run in the TCG Pocket, with the Charizard ex deck not far behind it, so picking this pack starts you off well if you're planning on playing the actual card game