This is speculation about information from the August 1st trailers and should not be treated as fact.
We were all slightly overwhelmed with the amount of news The Pokémon Company rolled out on August 1st. Within that news bulk, however, we were introduced to the new Pokémon, Oricorio. Oricorio is a secondary Flying type Pokémon who has four forms. Each of those forms has a different primary type.
Baile Style Oricorio is a Fire/Flying type.
Pom-Pom Style Oricorio is an Electric/Flying type.
Pa’u Style Oricorio is a Psychic/Flying type.
Lastly, Sensu Style Oricorio is a Ghost/Flying type.
It was also stated that “Since it has four different forms—the same as the number of islands in Alola—it would seem that different Oricorio live on each of the islands.” The same is true for the Guardians of Alola. Tapu Koko, Guardian of Melemele Island, has already been confirmed to be an Electric/Fairy type. There are three other Guardians that we do not know about. It has been speculated that they will all be secondary fairy types. 
That would make them Fire/Fairy, Psychic/Fairy, and Ghost/Fairy. If this is true, then the Guardian and corresponding Oricorio will probably be found on the same island and that would also mean Pom-Pom Oricorio will be on Melemele Island! Do you think the last three Guardians also be the same primary type as the corresponding Oricorio, or is it just sheer coincidence? Let us know what you think in the comments!