The Pokemon Trading Card Game has often included unique designs and very rare cards to make every different set equally appealing, with the Pokemon Sun and Moon era introducing also regional forms and their card versions. The Pokemon Company is no stranger to making fantastic sketches for the Pokemon Trading Card Game, sometimes even allowing fans to participate in contests to show off their artistic prowess and have their creations immortalized in future sets. An example comes from the Illustrator Pikachu card, which was awarded as a prize for the Corocoro Comic Pokemon Card Game Illustration Contest held in 1998.
After the release of Pokemon Ultra Sun and Ultra Moon, as customary, The Pokemon Company released sets themed around these Gen 7 games, with the first being Pokemon Sun and Moon — Ultra Prism. While Ultra Prism introduced Ultra Beasts and the concept of Ultra Wormholes, like the games, some fans noticed a peculiar detail on one of the set's cards.
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A Reddit user by the name of WeedleLover2006 shared a post highlighting how the Pokemon card for Bastiodon from the Ultra Prism set had an Ultra Wormhole on top of a mountain in the background. While this is clearly to create a fitting design for the Pokemon Ultra Sun and Ultra Moon sets, fans are seeing a foreshadowing of Pokemon Legends: Arceus in this picture. This is because Pokemon Legends: Arceus' space-time rifts were a big part of the plot, and the big space-time rift that opened on top of Mount Coronet heavily resembles the Ultra Wormhole on the card.
As such, it's possible that Pokemon Legends: Arceus was already in the pipeline when Pokemon Ultra Sun and Ultra Moon sets were being designed, as
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