QotD: What is an endless information rabbit hole that you’ve found while collecting?

[slowqueen]

121/S-P Korean Sticker Coloring Book Stamped Galarian Slowpoke

I had a dream about it last night

Korean coloring book stamped Galarian Slowpoke promo 121/S-P?

Has anyone ever laid eyes on this card? If you’ve ever seen this card, have any information about it, have a lead on where I might find one, or have conclusive proof that it exists – I would be very eager to learn more. [Slowpoke] Here's what I know: The card was some kind of purchase bonus offered with the Korean Pokemon Sticker Coloring Books vols 1 and 2, I believe around 2021 or 2022 I believe the card was not inside the books Seemingly no one has this card [s-l1200] Here's what I've …