Question

Not as a starter,but in the game in general. P.S.I mean Bulbasaur,Charmander,and Squirtle

Answer 1

Not without trading or migrating.

Unlike Diamond, Pearl & Platinum however, Heart Gold & Soul Silver give you access to three out of these four possible sets of Pokémon. As such, you can only pick one of them in each set so you must choose wisely.

Source

Answer 2

Not without trading, i'm afraid.