Pokémon Pikachu once was a lonely wild Pichu who lived in the woods outside of Pallet Town and once it fell off a cliff and was saved by a mother Kangaskhan. Mother Kangaskhan realized that Pichu had nowhere to go, so she placed him in her pouch and took him into her care. At some point, Pichu realized that it was hard for mother Kangaskhan to carry him and her own child and he left his adoptive family, his strong feelings for them made him evolve into Pikachu. Pikachu was caught and given to Professor Oak who later gave Pikachu to Ash and soon Ash proved himself to Pikachu and they became happy inseparable friends. A fanart Pokémon progress bar for YouTube with Pikachu Waving Hello.