Walkthrough
Because you won't be able to reach the summit of Pokemon Tower because of the Ghost Pokemon found within the structure, you won't be able to save Mr. Fuji just yet. You options now with be limited to heading south of Lavender Town on Route 12 or west on Route 8. However, as you may recall, the path on Route 12 is still being blocked by that sleeping Pokemon. You really have no choice but to head on Route 8 in order to begin the trek to Celadon City.
Wild Pokemon
Grasses:
Pidgey (30%): Levels 18-20
Meowth (30%): Levels 18-20
Ekans(FireRed)/Sandshrew(LeafGreen) (20%): Levels 17-19
Growlithe(FireRed)/Vulpix(LeafGreen) (25%): Levels 15-18
Pokemon Trainers
Lass Julia: Level 22 Clefairy, Level 22 Clefairy
Gamer Rich: Level 24 Growlithe, Level 24 Vulpix
Super Nerd Glenn: Level 22 Grimer, Level 22 Muk, Level 22 Grimer
Twins Eli & Anne: Level 22 Clefairy, Level 22 Jigglypuff
Lass Megan: Level 19 Pidgey, Level 19 Rattata, Level 19 Nidoran Male, Level 19 Meowth, Level 19 Pikachu
Lass Andrea: Level 24 Meowth, Level 24 Meowth, Level 24 Meowth
Super Nerd Leslie: Level 26 Koffing
Lass Paige: Level 23 Nidoran Female, Level 23 Nidorina
Biker Jaren: Level 24 Grimer, Level 24 Grimer
Biker Ricardo: Level 22 Koffing, Level 22 Koffing, Level 23 Grimer
Super Nerd Aidan: Level 20 Voltorb, Level 20 Koffing, Level 20 Voltorb, Level 20 Magnemite
Gamer Stan: Level 22 Poliwag, Level 22 Poliwag, Level 22 Poliwhirl
Pokemon Trainers - VS Seeker Rematch
Gamer Rich: Level 30 Growlithe, Level 30 Vulpix
Twins Eli & Anne: Level 28 Clefairy, Level 28 Jigglypuff
Lass Megan: Level 22 Pidgeotto, Level 19 Raticate, Level 23 Nidoran Male, Level 21 Meowth, Level 22 Pikachu
Lass Megan: Level 46 Pidgeot, Level 47 Raticate, Level 47 Nidorino, Level 47 Persian, Level 48 Raichu
Biker Jaren: Level 28 Grimer, Level 30 Muk
Items
Rawst Berry: On Ground
Leppa Berry: On Ground
Lum Berry: On Ground
Leppa Berry: ItemFinder
Rawst Berry: ItemFinder
Lum Berry: ItemFinder