Zero

Zero best known as the Unknown Saiyan. He is the 1st villian of Xavier Z. And is 22 years old as of the Crissis of Multiple Earth Saga. Zero came to the Earth in hope of taking over it, saying his partners would come to check on his progress two months later. Yet Zero's plan failed due to Xavier and Gohan, who battle him in Tokyo, defeat him and nearly kill him! Zero is now a trusted ally of the X-Fighters.