Do starters spawn too much? As opposed to Gen 1 at times they didn't spawn at all.
Have 2 Feraligators and working on a third. (one is at level 30 w/ WG/HP so not sure if I even want to catch Totadiles anymore) Crocnauts are very common. I would attribute that to being by a water biome but they're everywhere! I have Meganium and ignore Chikaritas since they are ball eaters. Bayleefsvand Chikaritas are very common. They have replaced Odish and Bellsprout imo. The hardest one for me is Cyndawuail not because it's rare, but rather because I only use Pokeballs and Greatballs on it! L O L
But as opposed to Gen 1 starters. These are spawning at the rate of Odish, Bellsprout, Poliwag, & and Growliths, so they're definitely not rare. Which in some ways takes away from the specialness of them..
Answers
They're slightly more common than gen 1 starters here, but I still don't see one every day. I'd say they're definitely not too common.
It seems like they're much more common in large cities, and harder to find in suburbs. They may be too common in large cities only. Not sure how common they are in rural areas. Do you live in a large city?