>>28781348FIRST, let's clear the nomenclature. I made 7 categories of Pokemon:
ND -- Noncircular Detailed
Eyes that have some corner and a detailed pupil, meaning it actually has an iris. Most of the anatomical mammalian eyes are here. Eye white is required
NP -- Noncircular Plain
Cat eyes, slit eyes etc go here. The Pupil is not as detailed, hence.. plain. durr.
B -- Bug eyed
Your Pikachus, your bug-type eyes, eyes that are button-ish, with no or a perfectly circular iris, no eye white
CD -- Circular Detailed
Circular or oval eyes with little to no real corner except a semi-straight line "generic angry" look. Iris required.
P -- Plain
Circle in Circle eyes, or Point in circle. sometimes also noncircular eyes are included if they really have only dot pupils with no all too complex shape either way.
E -- Emoji eyes.
Usually drawn-on looking or extremely abstract. Also includes Super Mario Shroon '_' - eyes.
NIL -- No eyes in default position (inclused ralts for example)