My mom found a silver GBA with Pokemon Crystal in it (funny, since that's a GBC game) at a hotel where she works, and gave it to me.I was eight at the time, and I didn't really understand it.Apparently there was a save file in the cartridge,and I started from Olivine City.I kept entering the Battle Tower, then randomly select the Pokemon's moves and lost everytime. XD
Somehow I managed to start a new game, but I kept looping back because I didn't know I had to save ... that is, until my dad told me. :)