Unlike most Pokemon that have a handful of notable cards spread across three decades, Pikachu has been printed in virtually every set, every promotional campaign, and every special collaboration the Pokemon Company has ever produced
This is commonly done when theres extra versions of a card that might cause a problem, because there would be that many more copies of that card out there
1x Pack (Japanese Official Pack Brand New and Unopened)
Clouding is basically an effect of microscopical damage to the card surface, that might add up over time to produce this dull effect
Check the PokeBeach set guide for the complete promo list with card numbers promos are typically not required for a standard master set but matter if you collect all set promos
OBSERVATIONS ON MULTIPLAYER With that said, Ive always been a big fan of the game and playing it for fun as a hobby and not just as a Pro