R/S/E era black star promo cards had the double-zero numbering system (in this case, #007) that they’ve used for a long time in Japan. Then, here in the West, the numbering system changed back (e.g., #7) until the SWSH era. Now, cards are numbered with 00 at the beginning again! (see, for example, https://pkmncards.com/card/grookey-on-the-ball-pokemon-futsal-promos-2020-fut20-003/)
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R/S/E era black star promo cards had the double-zero numbering system (in this case, #007) that they’ve used for a long time in Japan. Then, here in the West, the numbering system changed back (e.g., #7) until the SWSH era. Now, cards are numbered with 00 at the beginning again! (see, for example, https://pkmncards.com/card/grookey-on-the-ball-pokemon-futsal-promos-2020-fut20-003/)