I don't know if this was kinda obvious or not, but the pokemon cards I did a study of, are ones that I actually own.
Which is why there are a ton of rather old ones in there haha

I got this articuno card way back in gradeschool!
These were handed out to people watching the second Pokemon movie in theatres...wow I didn't realize I've had it for so long : O

Study based of this pokemon card: https://www.serebii.net/card/wizardspromos/22.jpg