Goku is a legendary fighter and one hit is all that he needs to take Rossiu down for the count. Rossiu doesn’t have enough endurance to survive a bout with Goku. Goku has the powers of a Super Saiyan and one good blast could destroy the entire planet in an instant! That’s no easy feat and Rossiu won’t be able to match it. Rossiu can try and take out a gun, but Goku could punch the bullet away and take the win. Goku wins.