>>27153388According to Lavater, A lipless mouth, resembling a single drawn line, (as is with Greninja, a detail that contradicts the constitution of the frog) denotes coldness, industry, precision, housewifery; and if it be drawn upward at the two ends (Once again, as is with Greninja), affectation, pretension, vanity, and, which may ever be the production of cool vanity, malice. Bearing extremely small or nonexistent lips is a result of the hypotrophy of the adipose cellular tissue in the mouth, and the great atrophy of the orbicular muscle.
It has been proven by scientists like Kretschmer, Crew, Cattell, and Mjoen that his type nearly always coincides with a sort of barren and reluctant sensuality. This corresponds greatly to Greninja’s muddled personality and lack of manual, authentic motion beyond the puppetry of its environment and its trainer within the anime.
Even for frogs, this is an anomalous trait.