Plus, how Baby-like does it feel?
For one, Toxel is classified as a baby Pokemon. This means it cannot breed. Its origin, according to Bulbapedia:
It may also be based on a human baby as its bottom-half closely resembles a diaper, the white spot on its chest is similar to a bib, and it also crawls on its hands and has temper tantrums.
Source
It's probably a mix of the two. There's no way to know how "baby-like" it feels, as we do not have access to a video game character's thoughts and emotions.
Hope I helped!
Toxel looks like it has a little diaper, and has a pouty face. It's Shield Pokedex entries state it can't use it's powers very well, reminiscent of babies that can't quite do things for themselves yet.
It manipulates the chemical makeup of its poison to produce electricity. The voltage is weak, but it can cause a tingling paralysis. Source