Pokémon has changed in some monumental ways since the video game franchise’s humble origins in ‘96, but the concept of evolution has always been an important element when it comes to a Pokédex’s completion. It’s a thrilling experience for any Pokémon Trainer when a Pokémon evolves for the first time and there are now a multitude of ways to trigger such a transformation. A Pokémon’s evolution can be the result of dedicated battles, environmental conditions, or even the creature’s temperament.
Source：https://www.cbr.com/pokemon-thunder-stone-evolutions/
