You can download (600x600) Pokemon - Pokeball Card Sleeves png clip art for free
If you want a deadly creature, you can always combine deathtouch and first strike
While Roxanne isn't a professor in the games, she is the first Gym Leader in Hoenn, which is actually such a subtle yet incredibly fitting promo for a professor of a beloved card
Dark Ascension - Complete FOIL Set (Factory Sealed) $499.99 US Shipping Only Due to export restrictions, this item may only be shipped to addresses in the United States, APO/FPO addresses, and Puerto Rico
While a wider global release hasn't been confirmed at the time of writing, both Scarlet and Violet and Sword and Shield's DLC ended up getting a physical release later down the line (albeit with some content as a required download), so we wouldn't be surprised to see Mega Dimension follow suit at some point