Getting the shiny charm in Gen 6

After my exams I will try to get the shiny charm in Gen 6, to get it I have to complete the National Dex for that generation (all Pokémon from Kanto to Kalos, excluding event exclusive Pokemon like Arceus and Shaymin), which from what I hear is possible by completing both the Kalos and Hoenn Dex as well as getting the bonus Pokémon from the Mirage Island and Pokéradar (if needed I have the DS entries). This would be impossible for me to do without Pokémon Bank or a second 3DS as I would need a way to transfer an entire living Pokédex across multiple games. Wish me luck.