The best starter is defenitely Charmander, here's why:

Gym
1st gym,use metal claw
2nd gym,use best move, be at least lvl 34, have 5 super potions
3rd gym,use ember
4th gym,use flamethrower
5th gym,use flamethrower
6th gym,use flamethrower
7th gym,use flamethrower
8th gym,use flamethrower, go all out use all power!
PEACE!

Charry