Gym Leaders and Their Pokemon

Brock	Specialty: Rock Pokemon: Geodude at level 12 Onix at level 14 Best Pokemon to Use: Water Reward: Boulder Badge, and the TM 34 - Bide. Make your pokemon stronger
Misty	Specialty: Water Pokemon: Staryu at Level 18 Starmie - Level 21 Best Pokemon to Use: Plant or Electric Reward: Cascade Badge, and the TM 11 - Bubblebeam Pokemon up to level 30 obey you
Lt. Surge	Specialty: Electric Pokemon: Voltorb at level 21 Pikachu at level 18 Raichu at level 24 Best Pokemon to Use: Ground Reward: Thunder Badge, and the TM 24 - Thunderbolt Speed of Pokemon Increase
Erika	Specialty: Grass Pokemon: Victreebel at level 29 Tangela at level 24 Vileplume at level 29 Best Pokemon to Use: Fire, Poison, or Bug Reward: Rainbow Badge, and TM 21, - Mega Drain Pokemon up to level 50 obey you
Sabrina	Specialty: Psychic Pokemon: Kadrabra at level 38 Mr. Mine at level 37 Venomoth at level 38 Alakazam at level 43 Best Pokemon to Use: None! A ghost has an advantage, but is also part poison, which are weak against psychic Reward: Marsh Badge, and TM 46 - Psywave Pokemon up to level 70 obey you
Koga	Specialty: Poison Pokemon: Koffing at level 37 Muk at level 39 Koffing at level 37 Weezing at level 43 Best Pokemon to Use: Ground or Psychic Reward: Soul Badge, and TM 6 - Toxic Defense of Pokemon Increases
Blaine	Specialty: Fire Pokemon: Growlithe at level 42 Ponyta at level 40 Rapidash at level 42 Arcanine at level 47 Best Pokemon to Use: Water Reward: Volcano Badge, and TM 38 - Fire Blast Special of Pokemon Increases
Giovanni	Pokemon: Rhyhorn at level 45 Dugtrio at level 42 Nidoqueen at level 43 Rhydon at level 50 Reward: Earth Badge, and TM 27 - Fissure All pokemon obey you