I recently came across these two sticker sets, which I recognize as the Japanese booster art for EX Sandstorm and EX Dragon. (In English, I believe these were used on some deck boxes as well?)
EX Sandstorm:
EX Dragon:
With Corphish for scale 
Does anyone know the origin of these stickers? Were they part of some official merchandise?
ex deck tins!
Ah perfect, thank you! Fun opening to watch too 
those arts are fantastic. I honestly believe 2003 was pokemon’s best year
Those deck tins were so undervalued for so long. I was picking them up for like ~$150 each in late 2019, early 2020. Fantastic value. I still have one of sticker sheets – I haven’t encountered any surfaces worthy of them yet 
The Rayquaza/Minun/Plusle art is insane. They also made sleeves with it. If there’s a poster with that art, I’d pay stupid amounts of money for it lol.
EDIT: just noticed that Flygon and Salamence are in it, too! Never noticed that. Only makes it cooler.
EDIT #2: and spoink!
The art of that Rayquaza/Plusle/Minum sticker is also used on sleeves.