The newest Pokemon Sun & Moon trailer today, revealed the remaining 3 Alolan Guardians, Alolan League and the Battle Tree.
The 3 remaining Alolan Guardians have been to be Tapu Lele, Tapu Bulu and Tapu Fini, of Island Akala, Ula’ula and Poni in that respective order. All their ability is similar, activating a certain terrain effect.
Lastly, it revealed that there is going to be a Pokemon League and a Battle Tree in Sun & Moon. In Battle Tree, trainers can battle with or against famous trainers from other regions such as Cynthia, Red or Blue.