Except the Intro, they look exacly IDENTICAL to me.Where are the differences ?
there are some wild Pokemons that are for leafgreen or firered this link is for the different Pokemons http://www.serebii.net/red_green/exclusives.shtml
There are some Pokemon that cannot be found in Firered that can be found in Leafgreen and vice versa.
This Link will show you the Pokemon.
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