This is Egon Spengler as he was re-engineered for The Real Ghostbusters cartoon. Why they gave him such a fey blue/pink jumpsuit, I have no idea. However, he's my favorite Ghostbuster, no matter which version, and thus he got the scribbling treatment. Officially, the original image was taken from the comic book, but as this 'version' is primarily known in the cartoon edition, I put it here.
In terms of the artwork, I just love it. The original pencils and inks were done in 99, but I revisited it and colored it in 03, and I very much like how I did the shading. It appears 3D to me, which is what shading is supposed to do. Particular favorite bits are his hair, his glasses, collar, and sleeves.