Gym Leaders and how to beat 'em

Under the name and Pokemon of the gym leader, you will find the best defense against him/her.
3dchariz.gif

Brock, Master of rock Pokemon in Pewter City
Best defense: Grass or water types

Misty, Mistress of water Pokemon in Creulean City
Best defense: Grass or electric types

Lt. Surge, Master of electric Pokemon in Vermillion City
Best defense: Fighting or Grass types

Erika, Mistress of grass Pokemon in Celadon City
Best Defense: Fire types

Koga, Master of poison Pokemon in Fuschia City
Best defense: Jeez, anything!! Koga's the easiest gym leader in the game!!

Sabrina, Mistress of psychic Pokemon in Saffron City
Best defense: Anything except fighting types

Blaine, Master of fire Pokemon on Cinnibar Island
Best defense: Water or rock types

Giovanni, Master of ground Pokemon in Viridian City
Best defense: I'd have to go with grass and water types.