Odi Isle is an island from the Whirl Islands in the Pokémon anime.
Ash, Misty and Brock arrived on this island at the end of Hi Ho Silver... Away! when they saw a Pikachu in the grass, shocking them that it was Sparky. They later saw Ritchie, shocking them, and Ritchie was surprised to see them as well. After talking for a bit, the group started to search for the Legendary Pokémon that was living on this island.