Something funny I found was that someone stole a custom cover I made of South Park's unreleased GBC proto many years back and sold it as a repro for like $70 (I'd personally sell the cart and printed cover for like $25 lmao). You can tell by looking at things like how it's shown in a DS style case, barcode number, font spacings, the ESRB logo style (I know many that would use the modern design instead of the accurate 90s one), and placment of other logos. I'm not sure where he got the cartridge label, but thing I saw that design on DA also. The listing: https://www.mercari.com/us/item/m99766985048 Link to my cover (old account, I know):