I've got a small collection of items that I plan on expanding, I got an Eevee plush back in January (bootleg) then in April I found a Riolu at a gaming con (official) so I picked it up, I like keeping them on the modem which is on my desk, so basically they keep me company all the time lol.
In April, I also met an Internet friend which had some spare Pokemon figures from McDonald's and so he decided to give me one, a Vulpix. :> I also keep this one on my desk.
Later, I repaired a friend's PC and since he knew I like Pokémon he had a copy of SoulSilver, he's not really into Pokémon anymore so he decided to give it to me; this is special since it also came with a fully working PokeWalker! I only had to change the CR2032 battery in it since the old one was dead (when I tried to turn it on the first time it I was so scared it didn't work at all haha), pretty normal since the unit has not been used for a really long time. Once the battery was replaced I tried to use it and it worked flawlessly.
The cartridge also worked without an issue, I'm currently playing it on my 2DS without any problems.