We cannot deny that Robotnik isn't the only super villain on the block, but we can prove that he is the best. I've put together this little head-to-head comparison of some major videogame meanies, including our own Doc Robotnik. Check out the proof in writing: 

Name: Bowser
Series: Mario Bros.
Intelligence: *
Strength: *****
Meanness: *
Persistence: ****
Overall: **
Comments: Big. Stupid. Lecherous. One out of three: I don't think so.  Name: Dr. Wily
Series: Mega Man
Intelligence: *****
Strength: *
Meanness: **
Persistence: ****
Overall: ***
Comments: Close call...the similarities between Dr. Wily and Dr. Robotnik are astonishing. But Wily actually turned into a good guy at one point. Bad Wily! Bad!  
Name: Ganon
Series: Zelda
Intelligence: ***
Strength: ****
Meanness: ***
Persistence: **
Overall: ***
Comments: Loses points for inconsistency. Sometimes he's a big pig monster, sometimes he's a green-skinned ogre. And he breathes funny.  Name: Ghaleon
Series: Lunar
Intelligence: ****
Strength: ***
Meanness: ***
Persistence: *
Overall: ****
Comments: Cool attitude, but he looks and sounds gay. As Spam would say: "Step away. Just step away."  
Name: Sephiroth
Series: Final Fantasy VII
Intelligence: **
Strength: ***
Meanness: *****
Persistence: **
Overall: ***
Comments: Robotnik may be nasty, but he's not a murderer. And swords are for sissies.  Name: Dr. Robotnik
Series: Sonic the Hedgehog
Intelligence: *****
Strength: *****
Meanness: *****
Persistence: *****
Overall: *****
Comments: What is there to be said? Perfection is perfection.