After you have found the Old Sea Map on Route 22, take it to the old captain in Sunset City. He can take you to this remote island.
Hidden in the grass is the extremely coveted Mythical Pokémon: Mew.
Obtainable Pokémon[]
| Pokemon | Level | Location |
|---|---|---|
| Mew | 30 | Hiding in the grass. |
Obtainable Items[]
| Items | Location |
|---|---|
| Comet Shard | Item Ball near the entrance. |
Trivia[]
The Old Sea Map was initially intended to be a limited time Mystery Gift, but due to technical issues, was made into a regularly obtainable item.