Kevin looks similar to his counterpart's Omniverse appearance. However, his sleeves are neater, and his padlock necklace is now gone.
In Ben 10: Heroics Unleashed, he has his canon self's Alien Force season 3 appearance, but with an apron over his torso. His white T-shirt is black, and his hair is neater. He is half a head shorter than his canon self.
In Ben 23: Hero Generation, he has his canon self's 12-year old Omniverse appearance, but he is a head taller, with his Alien Force/Ultimate Alien head and facial features. His sleeves are longer and he has no padlock. His pants are also longer.
Glitch (For POTO) - AssassinTen (Image, also for POTO) - Smartoad (For Ben 23) - Sonicsound (Also for Ben 23) - Beetlechomp (Also for Ben 23) - Fairyflight (Also for Ben 23) - Bandage King (Also for Ben 23) - Magnidude (ALSO for Ben 23) - Metalliation (ALSO for Ben 23) - Turtlewind (Image, for Ben 23)