The Hardcore community in MMOs is insane at the moment and I guess a lot of players would be interested to challange there selfs to run hardcore on PokeMMO.
So my suggestion would be a hardcore server, where your player gets whiped/deleted if blacked out. As an extra a official nuzlock server would be also great but i guess thats not really doable cause we dont want do use modded roms ^^ so yes, my suggestion would be only the hardcore server, where your character will be deleted after a blackout.