The recommended moveset for Charizard in Pokemon Red and Blue is as follows: Flamethrower Earthquake Double Team Fire Blast Flamethrower and Fire Blast: Charizard's primary Fire-type arsenal.
At the beginning of the game, they'll have the opportunity to pick one of three starter Pokemon divided between Water, Fire, and Grass ... Ivysaur, and Venusaur may not be the best Grass-type ...