u were only talking about one pokemon and now its 3-4,
the only proof you need is the pokemons id number,
and why would you quit just because you lost a pokemon, its just a game, its your loss if you quit, this is no point to quit the game you are either lying or bluffing.
many people say they will leave PRO and they don't.
have you given your password to anyone?
have you given your account ot anyone and then log into it?
i have many more things to say but i don't think this is a solid case so this will probably be my last post here.
if nothing helped i hope you find them. ^-^
please check in the last box with pokemon in it if you have not already ^-^