The Lillie Promo card (397/SM-P) from the Pokémon Sun & Moon Extra Battle Day event is a highly sought-after piece due to its limited release and the popularity of Lillie as a character among collectors.

Released on October 1, 2019, this card is celebrated not just for its stunning artwork but also for its rarity within the competitive Pokémon card scene.

The card's excellent condition, preserved in a dehumidifier and kept in a sleeve, enhances its desirability, reflecting the meticulous care that serious collectors demand, especially for Japanese promotional cards.

Given the passion surrounding the franchise and the typical market dynamics, bids now approaching ¥5,500,000 indicate strong collector interest, suggesting a significant appreciation for well-preserved, limited-edition cards from this iconic series.