Ōrotto is still around, it's been showcased in a horde battle in the Japanese eShop trailer.
This is nothing unusual, during the release of previous generations, we usually knew about some Pokémon for months, even though they were never ''officially'' revealed by either CoroCoro, or by the Pokémon Company themself. If something is worth showcasing in a trailer, it will usually make it till the actual release.
TheRoyalXerneas said:
So in the new Japanese eshop demo, Oorotto has been confirmed to be weak to fire types. So it's grass typing has been confirmed.
Here's a link: http://m.youtube.com/watch?v=TotwurUNRdI
It could be an Ice type, who knows?
It's not comfirmed, but highly likely, as predicted.