Nazo in base form vs Goku. Goku can reach up to SSJ3 for this fight. Who'd win between...
SSJ1 Goku vs Nazo:
SSJ2 Goku vs Nazo:
SSJ3 Goku vs Nazo:
http://www.youtube.com/watch?v=JkYXhyBYrWo To see Nazo in action, here he is holding his own against Super Sonic and Super Shadow.
Note: YES Nazo is fan made! But he was meant to be an official character in Sonic X, but the idea of him was recycled. Nazo Unleashed is the best of what we've got on him. Yes it's fan made, but it's SO popular.