While some are 1 to 1 with a few words or effects changed to fit into MTG other are a reimagined card that i feel keeps with feeling of the OG cards
Snorlax, Garchomp Ex, Leafeon Ex, Crobat, Raichu, Carnivine, Irida, Barry, and then Pokemon TCG Pocket 's Arceus Ex itself are all either very valuable now, or at least tend to pop in and out of meta decks consistently
There are likely a number of dragons that were of similar relative strength to Rith, the Awakener over the years, but Rith, the Awakener got its moment while those others did not
Extreme rarity in mint condition, nostalgic demand, and iconic status drive values into millions for high-grade specimens
Timing restrictions (such as "Cast [this card] only during combat") still apply
A card in mint or graded condition can see its value increase greatly, especially for popular Pokmon such as Charizard