Let me show you my Pokéma... my Pokédex.
The stickers were included with some popular chewing gums, strange since they were really cheap and back in the day every Pokémon related product was ridiculously overpriced. Despite being very frequent and popular there was a bunch of extremely rare stickers, luckily I was able to find all the 150 original ones. There was also a new collection with the Jotho Pokémons, but afaik not all Pokémons were included, The quality of the stickers was significantly better, the original ones look like shit now.
I used to carry it with me everytime I went out, the ritual of finding a sticker I didn't have, opening the album and sticking it felt like Ash opening his Pokédex to register the new Pokémon, lol.
Speaking of pokedex, I had the Kanto and the Hoenn one.