Sprout is a smaller than average, soft cyan Squirtle with blue-ish gray markings around his face, arms, legs and tail.
He shell consists of a pale yellow front with a white diamond in the middle, a white rim with black spots, and a riverbank brown with lighter shade of markings on each section.
Finally he has adorable, black eyes with a rose pink tint.
Sprout has an introverted, shy personality, really being a strong and dependant pokemon but had troubles forcing him to be less talkative and defensive about himself. He most of the time doubts a lot of things where Teriyaki has to encourage him in, overall positively, Teriyaki explained, once you build a small friendship, he seems to be very sweet and does his best at most.