You can't find the Old Sea Chart in FireRed.
You can't without using cheatcodes. The Old Sea Chart is only obtainable and useable in Pokemon Emerald.
AnswerSorry, you cant unless you mix records with someone who has an old sea chart or an ar/gameshark
no one!
You have to go to an Nintendo event.
Old sea chart
It is not possible to receive the Old Sea Chart in Pokemon Emerald without going to an event or using a GameShark.
Mix records or go to a Nintendo event
The Old Sea Chart is a key item given out only through events (however it can be hacked into the game) and is only available to Emerald version.
You CANT Get It As A Mystery Gift In ANY POKEMON GAME!To Get The Old Sea Chart,All You Have To Do Is Go To A Nintendo Event.Good Luck Getting It!;]
get it from an old man in shoal cave
plain and simple you can't