Walkthrough
Route 9 will lead you directly into Route 10, a path that is separated into two sections because of Rock Tunnel. As you enter Route 10, you will be accosted by more members of Team Rocket. Luckily, Lorelei, one of the Elite Four Members, will arrive and help you defeat them. With Team Rocket taken care of, you will then be able to proceed into Rock Tunnel. After learning the Sea Skim Technique, you can return to Route 10 to surf the waters straight to the Power Plant.
Wild Pokemon
Grasses:
Rattata (15%): Levels 18-23
Spearow (15%): Levels 18-23
Nidoran F (15%): Levels 18-23
Nidoran M (15%): Levels 18-23
Raticate (10%): Levels 18-23
Fearow (10%): Levels 18-23
Krabby (10%): Levels 18-23
Nidorina (5%): Levels 18-23
Nidorino (5%): Levels 18-23
Grasses - Special Spawns:
Chansey: Levels 18-23
Waters:
Tentacool (45%): Levels 18-23
Magikarp (45%): Levels 18-23
Tentacruel (5%): Levels 18-23
Dratini (4%): Levels 18-23
Dragonair (1%): Levels 18-23
Sky:
Spearow (60%): Levels 3-56
Fearow (40%): Levels 3-56
Sky - Special Spawns:
Dragonite: Levels 3-56
Charizard: Levels 3-56
Articuno: Levels 3-56
Zapdos: Levels 3-56
Moltres: Levels 3-56
Trainers
Team Rocket Grunt: Level 22 Raticate
Camper Vance: Level 22 Eevee, Level 22 Psyduck
Coach Trainer Tasha: Level 25 Poliwhirl, Level 26 Primeape
Hiker Clark: Level 25 Geodude, Level 25 Graveler
Picnicker Carol: Level 24 Pikachu, Level 24 Pidgeotto
Camper Trent: Level 24 Krabby, Level 24 Sandslash
Poke Maniac Damian: Level 25 Charmeleon
Poke Maniac Mark (Near Power Plant): Level 42 Rhyhorn, Level 42 Lickitung
Obtainable Items
Super Potion: Near Grass Patch
Great Balls: Defeat Camper Vance
Poke Balls: Near Camper Vance
TM13: Defeat Coach Trainer Tasha
Poke Balls: Defeat Hiker Clark
Great Balls: Near Hiker Clark
Great Balls: Defeat Picnicker Carol
Great Balls: Defeat Camper Trent
Poke Balls: Defeat Poke Maniac Damian
Nanab Berry: Hidden In Flower Patch
Poke Balls: Defeat Poke Maniac Mark Near Power Plant
Thunder Stone: Near Power Plant
Post Game
Walkthrough
After defeating the Elite Four and starting the Master Trainers Challenge, you will find a number of Master Trainers on Route 10. In total, there will be four Master Trainers to defeat.
Trainers
Ace Trainer Christopher (Master Trainer): Level 70 Charmeleon
Youngster Bret (Master Trainer): Level 65 Rattata
Psychic Frasier (Master Trainer): Level 80 Alakazam
Scientist Levi (Master Trainer): Level 75 Electabuzz