I have some old school stuff, i have a coupe of base set holo charizards and most of the earlier cards, I also have a little bit of 35mm film used in cinemas for the pokemon 2000 movie. But i would say the rarest thing is 2 pokemon comic books i have which are signed by Eric Stuart (voice of Brock), Veronica Taylor (voice of Ash) and Addie Blaustein (voice of Meowth), both comics are sealed and have certificate of authenticity ^_^
I really want to start collected those gold plated cards though because they seem pretty cool
I had a Pikachu plush toy that I gained when I was child and kept it until I became a teenager. Pikachu was round and fat, but I liked it a lot. It wasn't a big push toy, I could be grabbed by only one hand. When I became 20, I donated it to the poors in the Chirstimas time.