2015 pokemon cards Medicham Rare Stage 1 Reverse Captured in a crystal Dialga 2015 Pokemon XY Full

The Pokemon Center operates on Pokemon Center time

You can explore all the details in our Set Mastery article

9 Pokmon Chase Cards That Keep Rising in Value Despite Market Drops Share While the broader market for modern Pokmon singles has seen a notable decline, a select group of high-demand Pokmon chase cards from past and recent sets continues to defy trends, steadily increasing in value

While in practice meld cars function somewhat like double-face cards, as far as the rules are concerned they do not, so any rules around transforming double-face cards dont apply here

The rarity drives the value here, and collectors want to own the rarest cards