The Saiyan of darkness and light: Dragon ball x OC

Dynamic Duo vs. The Ultimate Saiyan

Goku punches Corget in the stomach and Vegeta follows up with a kick to the face which makes Corget skid back. "Not bad." says Corget as he charges Goku and punches him in the face but nothing happens. "Your not gonna hurt us in that form." Goku then knees Corget in the stomach making Corget step back. "Okay then I'll take it up a notch." Corget then starts to power as his hair turns black and begins to grow, then a red aura surrounds him. "Haaaaaa!" Goku then looks at Vegeta with a confused face. "What form is above super saiyan 3?" asks Goku as he scratches his head. "It should be god but he doesn't seem to have godly ki." says Vegeta as he gets ready for an attack. "Just be ready." and as the red aura around Corget disappears it shows more and more of him. "The thing about godly ki is that I don't need it to beat you." And as the aura disappears they see Corget covered in red fur with long black hair. "This is super saiyan 4." says Corget as he tightens his wrist band. "Shall we begin?" Corget then jumps at them trying to punch Goku but goku counters him and punches him the stomach but it doesn't faze him. "I hope you have a lot more where that came from." Corget then punches Goku in the gut instantly sending Goku back to base form. "When I'm in this form there's nothing I can't do." says Corget as he knocks Goku into the ground knocking him out. "Your turn vegeta." Vegeta looks down at Goku then back at Corget. "It's about time I get my own fight." Corget then chuckles and stances. "This is a fight you don't want." Vegeta then smirks and stances. "Are you sure about that?" Vegeta then pushes Corget with all of his power. "Let's see what you can do!"