The demo for Pokémon Sun and Moon contains a ton of data for the full game, including pretty much the entire Pokédex. Spoilers abound in this article.

Pokémon Sun and Moon release coming November 18
Dataminers have already made short work of the demo, unleashes tons of information on evolutions and the other classic Pokémon that will be getting Alola forms.
First off are the evolutions of the starting Pokémon:
aaaaand there they are pic.twitter.com/vxXSK3dQm3
— Ryan (@TKOWL) October 18, 2016
Also there is the Alola form of Persian, Meowth’s evolution, and the Geodude evolutions (with some rad eyebrows and a beard thrown in for good measure):
#sunandmoondemoleaks higher quality pic.twitter.com/QeT4qlhXAF
— Gavin Lee (@GoddamnItGavin) October 18, 2016
And there’s still a ton to come, I am sure. Be sure to check back with us for updates.
Pokémon Sun and Moon will be released on November 18th.