Like all previous games which were a start of a new Generation, Pokémon Sun & Moon introduce new and alternative methods for evolving many Pokémon. These evolutionary methods both enhance upon and even duplicate previous methods.
Level Up & More
Previously being included with several past instances such as there are several new level up Pokémon methods. These involve the Pokémon being at a certain level but with various specific constraints added to it to allow for evolution.
Introduced in Generation IV, there since hasn't been any more instances of Pokémon that evolve when they learn a specific move. However, Pokémon Sun & Moon has brought this back with one Pokémon.
Also for the first time since Generation IV, a new evolution stone was introduced. This item doesn't evolve any new Pokémon but rather Alola Forms of existing Pokémon.
Introduced in Generation IV, there have been Pokémon that evolve based on where you currently are in the game. Since then, the games needed various spots where these Pokémon evolve, which change every game. Pokémon Sun & Moon has, for the first time in 10 years, added a whole new place to evolve.
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