snyggking

Hello I was wondering if a pokemon can have met level 0 in Gen III. PkHex says that the pokemon is legit and if i change the met level it says that it is expecting met level 0. I know met level is tied to the PID and everything but is met level 0 actually legit? Like could it happen in game? My understanding is that pokemon bred in gen 3 have met level 0, but I could be wrong.