Pokémon Sun and Pokémon Moon has new Bracelet in the game which is like to relate something to evolution. I found a full proof of it is "Fusion Evolution".
Related video Links:
1) Pokémon Sun and Pokémon Moon - Demonstration - Nintendo E3 2016 - https://www.youtube.com/watch?v=k3syrodjiR0
2) More 3 New Pokémon and 4 in 1 Battle Royals Reveals | Pokémon Sun and Pokémon Moon - https://www.youtube.com/watch?v=mLaMyd-a97M