The "THE BEST OF XY" box featuring the coveted Mega Lucario EX continues the tradition of high-demand collectible cards from the Pokémon XY series, which originally aired in Japan from 2013 to 2016.

This set is particularly sought after due to its inclusion of rare cards such as the Shiny Shaymin and high-rarity Mega Evolutions, making it a cornerstone for collectors keen on completing their competitive or aesthetic collections.

Manufactured by well-regarded firms within the Pokémon Trading Card Game landscape, this unopened box is a testament to Japan's strict quality standards and preservation, further enhancing its desirability.

With a starting bid of ¥888,888, this auction reflects the current market dynamics where limited edition boxes can command high prices due to their rarity and the nostalgia tied to the XY series.