I guess I'm somewhat late to this but I only got a chance to post now
Anyways, thoughts:
Starter evos:
Weird to see Decidueye replace the Flying type for Ghost, after all, Rowlett was the first starter since Bulbasaur to have a secondary typing. Regains the Electric resistance, loses the Poison weakness and gains two new immunities. Spirit Shackle looks like an interesting move and I love its attack animation
Next is Incineroar, its animations make it look really cool. Another Fire/Dark, was Houndoom or last one of those or am I just forgetting someone? Also, yay, first Gen 7 Dark type Pokemon, I'm not using it but it's good to know there is at least /ONE/. Darkest Lariat is basically Dark!Sacred Sword, though I doubt it'll have as much BP. Incineroar got the best signature move though.
Finally, Primarina and the diamonds, and oh my god he looks so pretty in action. Water/Fairy is the typing of my redemption. Sparkling Aria sounds underwhelming unless it has enough BP to compensate or if it works like Wake-Up Slap and it doubles power if the opponent has such status. Pls learn Will-O Wisp
Overall, I think this Gen has my favorite starter trio, I like all of them a lot and there's none I'm indifferent towards or that I just hate completely
Tapus:
Surprised Bulu is Grass/Fairy, but I like all of them. All have one of the 3 Terrains from XY and the new Psychic Terrain, good to see GF is expanding on it, though now I fear Thunder Tapu Koko+Politoed in Doubles
And does Guardian of Alola takes out 75% of the total or current HP?
I'm assuming Battle Tree is the Battle Frontier of this gen, just hope they don't ruin such good premise with boring generic NPC battles.
I'm assuming the future Pokemon League has nothing to do with Battle Tree but I'm not sure, can anyone clear this up to me?
Also, it seems Triple and Rotation Battles are being cut
Which is actually pretty disappointing to know, even if they weren't used much, they were still fun and unique.