When I was... 6, I was in school, I fell down some steps, got caught by some glass that had been spilled there somehow, and my leg needed stitches, so I was sitting in the entrance hall waiting for my mum with a teacher, crying, and one of the big kids came along, and saw my leg, and I'd been crying, so he gave me a bunch of his pokemon cards. Hooked.
From the games, it would be beating the entire game of gold with my lv 100 typhlosion.