One Island.
There is no mount Silver in Firered. only a mount Ember.
Go past mt moon go east and you will be in cerulean city.
Yes, there is a way to get Kanto Starters. After defeating Red at Mt. Silver, you have to go to Professor Oak's lab to choose only one Kanto starter.
Red is at the summit of Mt. Silver. The higher you go up, it starts to snow and hail, and you know you are getting closer.
There is no Mt. Sliver on FireRed
One Island.
Ash, or Red in this case, is at the top of Mt. Silver staring out into the distance. He is dressed like a firered/leafgreen character.
Go through Mt. Moon.
Go to the top of Mt. Silver and fight Red, the strongest trainer in the game, also the main character from Red/Blue/Yellow/FireRed/LeafGreen
Mt. Silver is near Victory Road. You have to defeat the champion first to go to the left in the entrance. Then you can come to Mt. Silver.
Go east from Pewter city. You have to go through Mt. moon
Go to Mt. Coronet at the lake. Or, get him in FireRed, and migrate.
There is no mount Silver in Firered. only a mount Ember.
Mt coronet is only in diamond or pearl or platinum not in firered.
Go past mt moon go east and you will be in cerulean city.
go to mt. ember[have to past the elite 4