japanese pokemon cards back side Card Backside in High Resolution by AtomicmonkeyTCG on DeviantArt Japanese Pokemon Cards vs English:

Each deck is crafted to deliver exciting gameplay with legendary creatures, unique synergies, and Fallout-inspired mechanics

Combining booster packs, sealed products, and singles allows collectors to build personalized collections while giving competitive players more opportunities to strengthen their decks

As an example, Emchompite says that cards that were included within Japanese sets, like the Secret Rare Yveltal EX from Best of XY, but as promos in English, are usually more expensive in Japanese just due to the nature of their release (i.e., having to pull the card from a pack vs a guaranteed promo card in a product)

The next thing you'll want to look for is removal, which is any card that gets rid of your opponent's cards