It can be anything and everything! My personal favorite non-TCG Pokémon product to collect are the Daiichi Pan stickers. I find species collecting the stickers really satisfying and having an official database that catalogues everything that’s out there is a huge plus.
Excited to hear what your favorite is! Bonus points if you include a picture of your collection!
What a wonderful collection of Eevee plushies, I love them!
I have so many favorites!
Very happy to have these vintage Trainer Magazines. They have old set lists, introduce you to dark and steel types, teach you about how to have fun with Pokemon on the Internet, and more
I’m a big fan of cards with anime scenes on them
Also vintage vending machine bootlegs
I LOVE these! I wish Darkrai (the main Pokémon I collect) was a bit older so I could find cool vintage-era things like this! The anime scene cards are such a treat to look at! Also: had no idea about the vending machine bootlegs existing, those are so fun.
I’ve been working on collecting all the Pokémon games (no version or release exclusive)!
Unfortunately I cant show you any pictures of my entire collection so far since they are at my college apartment but here is what I have with me:
As of now though, I have:
Sapphire
SoulSilver
White
Sun
Moon
Let’s Go Pikachu & Eevee
and Legends Arceus
I put a pause on it as I wasn’t making any extra money at the time that I started it.
Also just for fun, I managed to shiny hunt Kyogre in Sapphire & Totodile on Soulsilver.
Kyogre took me less than 400 resets and I didn’t count for Totodile 
But here’s the proof!
These sticker sheets are great! I want to get the sheets that I had as a kid that I ended up using on my childhood binder’s cover.
I’ve never heard of telephone cards before! Just looked up more, these are amazing!!
Nice! I’d like to collect at least one from every Gen eventually. My collection right now is:
Ruby, Sapphire, Pearl, Platinum, SoulSilver, Black 2, Y, Omega Ruby, Ultra Sun, LG Eevee, LG Pikachu, Sword, Brilliant Diamond, Legends Arceus, and Violet.
Black and Emerald are my most wanted right now.
That’s awesome! After my Darkrai hunt is complete, I don’t know if I can ever do a full odds hunt in an older game again. I’m too weak!
W game collection.
And I was super lucky when it came to shiny hunting Kyogre, went well below full odds 
These are great! Especially a fan of that shiny Gyarados. I’ve been eyeing the TOMY Darkrai for awhile now… need to finally grab one!
Artbox Action Flipz, the source of my profile picture! I should have every known flip from all 3 sets by next Friday including the lesser known stickers. Really neat sets to collect with rares and everything. Best part is you can get them super cheap if you’re patient, making them a lot of fun to shop for over time.
I’ve seen these before on eBay but didn’t know what they were called. These are so neat! To be able to say you’ll own every known flip is incredible, congratulations!!
Currently still working on the different versions of Pokémon Battle Revolution, will make a detailed post once I’m done.
I had no idea there were so many versions of Battle Revolution: looking forward to seeing you complete the collection and your future post outlining them!
Yup, it’s really interesting how many versions it got despite selling just a bit over a million copies total which isn’t much for a Wii game.
To quote myself from a similar thread:
In general, apart from the TCG cards, I like collecting all Seviper figures most of all. Still missing three pesky Metal Collection Figure colors, but apart from that it’s complete - except for mysterious figures popping up on eBay every now and then. 
Greetz,
Quuador
