An outsider to the community can only learn so much gazing through the looking glass and speaking to a few players during an all-too-brief trip
Pokemon are not usually featured in other Pokemons card, you rarely see a Pikachu pop up on an Empoleon card
Introducing the Season 3 Battle Pass
While this card is in your hand or GY, if a face-up Dragon monster on the field, except "Keeper of the Shrine", is sent to the GY by a card effect or because it was destroyed by battle: You can Special Summon this card, then, if that monster sent to the GY is a Normal Monster, you can add 1 Dragon Normal Monster from your GY to your hand
Source: WotC WPN Collector Booster boxes (also called Displays) are just a way to buy 12 Collector Boosters together
Parallels are short-printed relative to base cards, making them more scarce and more valuable