Is this look too mature/aggressive to be a first stage Starter Pokemon??

Hey guys, big fan of a lot of y’all’s work. I’m working on a Fakemon Region project. This is my time ever trying to create fakemon. This is one of the starters I’m working on and just curious on some opinions of this guy. Does he look too evolved to be a starter? I want this project to be as “realistic” as possible. Any input is appreciated!