Quote Originally Posted by Bolt the Cat View Post
That's nothing new, they typically design the gym (especially the early gyms), so that your choice of starter is an inherent difficulty setting. They've done the same thing since the beginning of the series. For instance, in RBY Bulbasaur will give you the best advantage for the first two gyms since it's super effective against Rock and Water, Squirtle will give you an advantage against Brock but not Misty, and Charmander is weak to both.
This. The starters somewhat set your difficulty at times. While in the end, the starters are all effective in the story, especially in their final forms.