Overview
In the Forest of Okoya, Koko is a feral child who has been raised as a Pokémon by the Mythical Pokémon Zarude. Koko has grown up never doubting that he is a Pokémon even though he can't really use any sort of moves. Ash Ketchum and Pikachu meet Koko and help him protect the Great Tree from the crooked scientist Dr. Zed.
| Actor | Age then | Age now | |
|---|---|---|---|
 | 52 | 56 | |
 | 55 | 60 | |
 | 20 | 25 | |
 | 53 | 58 | |
 | 52 | 57 | |
 | 55 | 59 | |
 | 39 | 43 | |
 | 35 | 40 | |
 | 59 | 64 |