What do you think is the best/coolest/most interesting looking pokemon in the series and why?

I'm talking mostly aesthetics but small details like viability, interesting pokedex entry, etc. is important too. Bonus points if you attach a picture that helps prove your point!

Mine is Marowak. Cubone's story about using it's mother's skull was really powerful to me as a twelve year old kid playing Red so Marowak was always badass to me. It also isn't over-designed and is somewhat unique with it's Bonermerang move and the fact it's among like 4 pokemon that hold weapons.