Every card in the game has a rarity associated with it
I also have a Portuguese square-cut foil Island that I believe came from him, which is also appears to be a test print or material experiment and has some slight differences when compared to a normal foil Island of the same set and language but, again, nobody has much info on it
Gem Mint The highest possible grade a card can receive, indicating that it is in perfect condition
The main con is that you can only accelerate energy once you have manually gotten 3 other energy into play on a single Pokmon, with a specific attack, whereas Typhlosion and Eelektrik can give you a primed attacker of your choice in an instant, regardless of how many energy you already have in play
So enjoy
Binders, wishlists, and trade lists Use Pooka to organize cards the way collectors actually think: by set, deck, artwork, favorite Pokemon, trade target, or personal binder theme