After that? Wait for Bank/Transporter. Complete the Living Dex in full. And then... hunt for rare Pokémon, wait for Event Pokémon, wait for Z, etc. And there's still a couple of stuff I haven't done. Like visiting the 3-star Restaurant in Lumiose which costs 100.000 PokéDollars or the Sushi High Roller restaurant in Lumiose which costs 500.000 PokéDollars. Need to save up some money first... And then there's stil something else to do I think.