Update:
After I read about the exploit to skip objects I thought, well why not try it to escape the silent Oak. Mission success I was able to leave but got instantly teleported to Viridian Pokemon Center.
A friend casually mentioned how he got another Pokemon through Viridian Maze, and as I couldnt get a Pokemon any other way I made my way to get the abandoned Pokemon.
Community please welcome my new starter Pokemon Horsea!
But i still got the Problem of a missing Pokedex and as I wanted to log out anyway, better do it where I can safely reproduce the bug of Prof Oak not letting me leave.
To my surprise it is actually coded in, that when u talk to Oak with no Pokedex and a Pokemon, that he just gives you a Pokedex, saying its the one I lost.
So I got my Pokedex and a Pokemon. Not the typical starter, but hey atleast i can play :D
I guess I can now play the game normally though I dont know if there are any lingering side effects remaining on me.
For future "purged" people I hope that this can help you, but of course it would be more desirable if this bug is fixed till then.