pokemon gem pack booster box - CBB3C: Vol. 3 (Chinese) Each Pokémon comes with its own type Gem Pack Vol. 5 Booster

I am going to side more with it being a defect, but hard to be definitive

NIFYrebellio didn't specify the playstyle for this deck

Maybe you get to draw cards from a Harmonize, or maybe you sweep the battlefield with a Wrath of God, or maybe you get to spin the Wheel of Misfortune

You can only use one ACE SPEC card and since 2024 have had a nice shiny purple card with custom lettering and art, it really helps them stand out against other cards in your deck

A new way to win a Duel is introduced, where even if a duelist cant damage their opponent with the new themes monster, they can power it up enough to destroy 3 monsters, which automatically ends the Duel

ACE SPEC cards also have their own rarityone which is relatively high, thus contributing to demand for the card