I was thinking Charmander, but then i changed my mind. Inbetween Squirtle and Bulbasaur now, I dont know what Charmander evolves into so please tell me which one you would pick because I'm having alot of trouble! Thanks in advance!!
Honestly, it really only matters in terms of how challenging you want the game to be when you're just starting out. The first Gym uses Rock Pokémon, and the second uses Water Pokémon, so using Charmander presents the greatest difficulty. Squirtle would be medium, since Water resists Water, but Rock is weak to Water. Bulbasaur gives you the easiest journey, since both Water and Rock are weak to Grass. By the time you reach the third Gym, you should have enough Pokémon to tackle pretty much anything.
That said, I'd really only play any GBA Pokémon game in order to transfer Pokémon into Diamond, Pearl, or Platinum when it comes out through Pal Park.
Also, consider yourself fortunate if you get a female starter. That way you can breed it early without having to worry about Ditto.