Oook, here it comes the remaining evolution of our favourite ghosts!. Maybe I'll do a mega Gengar some time hehe. I spent more time on this one (seriously, I can't understand why do you like the gastly I did that much, it's just a smiling black spot with smoke around, nothing else!).
Here you have the others:
EDITED Jan 16 2017: Because of a copyright infringement case on this artwork, I've been forced to reduce the quality of this picture to avoid future incidences. I hope you guys understand. 
Get the wall print here: www.etsy.com/listing/707756179…

I hope you like them all!