Maybe it's that the card is too ubiquitous in play groups, is a bit too strong, or is just too difficult to deal with
The saga allows you to destroy planeswalkers or creatures, make opponents discard, and for a great finale, reanimates all creatures from graveyards
largely just the prototype forms of known Pokmon
This set featuring legendary Pokmon Dialga and Palkia warps the very fabric of time and space, bringing dimension-altering, powerful Pokmon ex-cards into dominance over the battlefield
During the Pro Tour this was recognized as a strong card and when I played in a PPTQ on Saturday, a couple of people were trying to find these
Because of this, they often dont have a whole lot of stock to shop aside from newer releases when it comes to Pokemon cards