Pokémon Trading Card Game Pocket has adapted the 30-year-old card game to mobile devices and the modern age, but fans are discovering that the game has sprinkled some nostalgic Easter eggs within the virtual cards. The free mobile game allows fans to open booster packs, collect and display their favorite cards, and battle other players, just like they would with the physical cards. The cards featured in the virtual game have been overhauled for more streamlined digital play, and many of the game's illustrations are entirely new to the game.

Earlier this week, Redditor asch_win discovered that a Spearow card exclusive to Tcg Pocket hid some clues to its location in the card's background. The card, it appears, was set on Route 16, just outside Celadon City in the original Pokémon Red, based on background details included in the drawing.

The same Redditor has found several other cards do the same,...