There are six different Theme Boosters available: one for each color and a multicolor Party Theme Booster which contains a bunch of cards that have or relate to the new party mechanic
Most players are just testing the waters and learning the cards, so we're still far from knowing what's good and what's bad
[27] Various facilities can be found throughout the Pokmon world such as Pokmon Centers, Pok Marts, and Pokmon Gyms
Additional ways to clue you in to some special, often valuable cards: Secret rares have a collector number higher than the total # of cards (supposedly) printed in that set, for instance "65/64" or "110/105." Secret rares can range anywhere from a couple of dollars to hundreds of dollars
We're working with a single printing of every card, so even though Grizzly Bears has been printed 26 times across various sets, we only really care about one of them
Lost Origin's Enamorus V (#TG18) Focuses More on the Trainer than the Pokmon Enamorus V is #TG18 out of TG30, and it is an Ultra Rare card from the Lost Origin Trainer Gallery