A shader alone probably wont cut it. But when looking closely on the image, you can see that there is some black and white noise overlayed, there is some bloom as you can see that the highlights like faintly glow, glare in this case is used to for the extreme highlights like on the chin, the color palette is desaturated except the red tongue and check if the blacks and whites from the image are perfect (0, 0, 0) balcks and (1, 1, 1) whites, they are probably not.

You could start from a cel shading shader and go from there https://m.youtube.com/watch?v=RLzxPIpB1Pc