If (most) Pokemon could talk, I imagine that the start of all games would go down a little like this video by Shippiddge. Lobbying, arguing, childish fights, silliness -- all so that you'll pick one specific Pokemon over the other one.
Charmander all the way, FYI. I'm a fire Pokemon kind of woman. The rock gym is just a temporary hassle!
Choose A Starter! [Pokemon SFM] [Shippiddge]