During the Nintendo Direct yesterday, a new trailer for Pokémon Sun and Pokémon Moon was shown that revealed another Alola form Pokémon as well as a special promotion for the upcoming game.
The newly revealed Aloha form is for Ratatta who will become a Dark/ Normal type and have the abilities Gluttony or Hussle. Those who purchase the game early on will also receive a Munchlax. By evolving it into a Snorlax and giving it the Snorlium Z it will be able it’s special Z-Move called the Pulverizing Pancake. Pokémon Sun and Pokémon Moon will be released on the Nintendo 3DS on November 18, 2016.
Source: Official Pokémon Youtube