Did Ash Pikachu Evolve?

After Pikachu's defeat in his battle against Lt. Surge's and his Raichu, he was given a choice to evolve but refused so he can prove he's strong without evolving.

Does Ash's Pikachu evolve into Raichu?

The other main reason that Pikachu hasn't evolved is that he has been a symbol of the franchise for decades. Ash's Pikachu evolving into a Raichu would have been in many ways the loss of an icon.

Did Ash's Pikachu evolve from Pichu?

Pichu befriended Kangaskhan and joined its horde. Pichu was able to form a close bond with the Kangaskhan and her child who enjoy having him in their family. Pichu starting to evolve into Pikachu. One night, Pichu left the horde, while he remembers his times with them.