He did? I don't remember anything about him beeing exiled! XD I'm going to rewatch FOTPT (I assume it was there?). Anyway, I would love to see any of the thousand and one wishes that ended poorly ;) But I would also like to know wether he left that basement in Storybrooke or not.
When he was a genie, he wished to never leave Regina's side in whatever world, and to look upon her face always.
But in season 2 finale, Regina was transported in Neverland. Sidney must, insome way be transported there, too. Maybe back to being a mirror (?). They should never be in different worlds. Or might be possible that Regina find a "loophole" in his wish.
Maybe Sidney can appear in a mirror that Regina holds with her, however that mirror then works the same as the one the Beast gave Belle in Beauty & the Beast. Maybe Rumple had it with him so he can check on Belle but that Regina also uses it.
I'm not sure if she's qualified to be mayor. She knows next to NOTHING about the town. I'm not saying she shouldn't be involved, but mayor? No way.
Actually she learned through Lacey about our world the writers have said she remembers all of the Lacey stuff so really she as qualified and as for the mirror well you know my thoughts
Sorry if I come off rude I just stating what I think