I'd say Pokemon made up about 43% of my childhood so I have a few stories...
Real Life Things:
I tricked a friend into believing that I had a real Meowth inside this toy Pokeball I was holding.
I taped a bunch of Pokemon cards to my clothes and used the power of the Pokemon as a sort of armor.
My friend and I had Pokemon as imaginary friends. She had a Persian and I had an Arcanine (he died btw).
Video Game/TCG Things:
I set all my Pokemon free in Emerald because I felt bad for them. The last one I tried to get rid of was a Tentacruel named Bider. When I tried to release it, the dialog said that it loved me too much so it came back to me. Now I know that it only said that because it was my last Pokemon.
I thought that the Pokemon on the card that looked the strongest beat the one that looked weaker. That's how I taught other people to play the game as well.
I made "Lass Dana" my character's girlfriend on Pokemon Crystal and called her all the time.
This isn't really something I did when I was little but I seriously thought that I was done with everything related to Pokemon so I sold all my DS games (Diamond, Platinum, Soul Silver, White, and Black 2). I had event Pokemon, shinies, and a bunch of other neat things on them. Guess who got back into Pokemon for the 6th generation? I don't think I'll ever get over this.
3DS Friend Code: 3394-4942-7910
Pokemon in my Friend Safari: Dedenne, Helioptile, Zebstrika
I cannot make a fancy signature but I can make your dreams come true (maybe...), so that's something, right?