As mentioned, they're original decks with their own cards (and their own set code, FIC), with actually little overlap with the main Final Fantasy set
This is the holographic dragon that every kid in 1999 desperately wanted to pull from a booster pack, the card that was worth more than every other card in the set combined in the eyes of schoolyard traders, the card that became synonymous with the Pokemon TCG itself
Speaking of old blue cards you've never looked at before...particularly in GUx decks that can ramp in other ways (hello, Tuvasa), Energy Flux will turn all mana rocks from ramp to liability
That absence was inadvertent, and those pages have been restored
Rotom While Rotom has six forms, only five have been released into Pokmon Go
Being able to go find any card from your deck whenever you want instead of waiting to draw it can help you assemble the pieces to a game-winning play