I , thankfully, haven't lost too many pokemon not willingly.
I lost my second ever Pokemon file(should be considered my firts, since I only got to Mt. Moon in the fisrt one) with a lot of play on it. I was being impatient, because the only Pokemon I was missing was Mew. So My friend with a gameshark got me one, but ME , being impatient, ripped the gameboy out of his hand, and my entire file was erased because the game fell out of the gameshark ;; I feel bad, because I made my friends before restart their games so I could get all the starters D:
BLah, too bad the Mew glitch wasn't known back then. It would've saved my game ;; Well, not really since I beat every trainer, but ugh. 150 pokemon down the drain. Charizard was my first level 100 Pokemon, and I only used like one Rare candy on it. It was my pride and joy.
I' have deleted many other files because I used cloning in Silver, and felt bad xD; so I restarted. I almost lost crystal because I wasn't paying attention and this kid started my fileover. I saw it right in time before they saved. Very glad too, Crystal is my pride and joy now.