I think that there isn't a page for it on the main site because the E4 is the SAME from G/R/B/Y. The only change is that their Pokemon get stronger the 2nd time you battle them.
If you need information about them, I can give you the names, Lvs, and types they have:
1st: Lorelie( sorry missspeling)- Dewgong- 54
Cloyster- 53
Slowbro- 54(/56?)
Jynx- 56
Lapras-56
2nd: Brono- Onyx- 54(?)
Hitmochan- 55
Hitmonlee- 55
Onyx- 56(?)
Machop- 58
3rd: Agatha- Ganger- 58
Golbat- 56(?)
Arbok- 58(?)
Hunter- ?
Ganger- 60
4th: Lance- Gyrados- 56
Dranair(2 of them)- 56
Aerodactil- 60
Dragonite- 63(?)
5th: Your Rival- Not that sure his team depends on your starter.
Sorry for the quastion marks it was a long time since I played my FR...

;007;