A close up of a cartoon rat in a lab coat giving a thumbs up

A gray opossum, chemistry lab coat, thumbs up, (vault boy style)

monochrome, purple fur, deformed, ugly, blurry, bad anatomy, disfigured, extra limb, deformed hands, deformed feet, face out of frame, multiple tails, ((bad anatomy)), disfigured, deformed, malformed, mutant, monstrous, ugly, gross, disgusting, blurry, poorly drawn, extra limbs, extra fingers, missing limbs, amputee, malformed hands, multi balls, multi penis, floating penis, dialogue, text, deformed face, signature, logo, extra ears, colored sclera, red sclera, robot, mecha, fangs, teeth, breasts, text, signature, watermark, deformed hands, simple background, framework, abs, border, framework, borders:1.3, smoke, speech bubble, english text, boring_e621_v4, EasyNegativeV2,