I haven’t looked at all the Japanese cards yet, but from the English I see five missing from a quick look (excluding EX era codes, since I assume you’ve excluded those on purpose):
- Shining Legends Cosmos Holofoil (from 5-Pack Costco boxes, released in Canada)
- Pikachu & Zekrom GX non-Holo with signature from the World Champions Deck 2019 - Pikarom Judge
- Sword & Shield Cosmos Reverse Holo (also from 5-Pack Costco boxes, released in Canada two weeks ago, so I still have it incoming myself)
- 035 non-Holo Nintendo promo (released exclusively in Sweden as insert of a magazine)
- Futsal Pikachu promo (these have started to pop up recently on eBay.co.uk, although aren’t exactly the cheapest…
I currently have my own incoming)
I’ve only took a quick look out of the top of my head, so I’ve possibly missed some. You can look at my English ‘Pikachu around the World’ collection post for an overview of all officially released English Pikachu cards (minus some recent releases, and one Art Academy Pikachu - the final English Pikachu card I’m personally missing). It’s only official releases though, so you won’t find well-known misprints like the Ghost Stamp; Inverted or No Stamp WB promos; upside down POP 5; etc. Those will all be mentioned in a separated post after I’ve done all languages (I still two more languages to go, I’m working on Spanish now, but I’m having trouble finding release dates 
).
PS: you’ve accidently posted the same picture twice. The text below it is correct (Celebrations cards), but the picture it incorrect.
Either way, amazing collection, and congrats on coming this far! Best of luck with the remainder of the cards. 
Greetz,
Quuador