Extremely cool to see such a comprehensive list, found some new merch for me too since alolan muk is presented in a lot of pokemon horizons merch! Too bad it’s quite difficult to search for, at least i haven’t found any search words that work very well. I also have some info on some of the items on your list
This set also had code variants if you are interested in those, a list can be found here
Gen 1 sets have a ton of different back variants, not sure if it also applies to gen 2 set but something you might want to check
Some of the cards of these sets have number variants with letters on them, i’m not sure how the rules of it work but it looks like shuckle has those variants since one of your cards is 213 and one 213c, so both gold and silver deck ones should have another variant too
This is made by topsun and i believe the year is 1999, it also should have 2 variants with small changes on artwork layout. You may want to check https://www.pokemonstickerpedia.com/ for more info on topsun and amada stickers and the years they are produced
This set also has a jigsaw puzzle on the back of the sticker set that features shuckle too, not sure if the artwork continues on sticker below it but shuckle is mainly presented on sticker Oshawott #08
I believe this also is a pan sticker, similar than the ones you’ve listed later. Iirc pan stickers have also chinese variants