[@Shurikai] No age limit! All [i]registered[/i] trainers have to be 10 or older. But that's it.

No restrictions to Pokémon! Except for the ones you can catch in the wild. There'll be a list of locations of where they can be found in wild and which pokemon in there. But any you have before the RP or any Shadow Pokemon you snag from Cipher (or non-shadow if you wanna roll that way) doesn't matter. Any region. 

I'll add those questions to the list.