AU Summary of my Penguin AU (Simuin AU)
This is Penguin Simon aka Simuin
He used to be just like canon Simon until shortly after the AT finale.
I haven't worked out exactly how he got turned into a penguin, but ever since it happened Ice Thing has pretty much adopted him as his own Gunther, making this AU a sort of role-reversal.
Finn, Marcy and co are aware that Simon got turned into a penguin, but since none of them speak penguin and Ice Thing got so attached to him that he can react quite aggressively whenever he can't find his "Gunther", they know it's probably best for him to stay in the Ice Kingdom, at least until they figure out how to change him back.
Though Simon knows that it's for the best at the moment, his new life as a penguin is not easy. Ice Thing is a constant reminder of his own time as Ice King, Turtle Princess is rather oblivious to his problems and most of the other penguins are bad eggs.
He's just gonna have to endure it and try not to fall victim to any predator or whatever until his friends find a way to un-curse him, again.