Do Pokemon Lose Their Memory When They Evolve

Why hasn’t Ash’s Pikachu evolved?

Ash gave Pikachu a choice to evolve with the Thunder Stone after Pikachu lost to Lt. Surge’s Raichu, but Pikachu chose not to evolve because he wanted to prove that he could defeat stronger Pokémon without evolving.

Do Pokémon lose personality when they evolve?

However, Pokémon evolution may have a tragic downside fans have overlooked: It is possible that, by evolving, a Pokémon’s personality is forever altered, permanently changing with its type and appearance.