so your saying chouji can beat kakashi a kage level ninja?
Yes he can, why? Because Kamui won´t work, Kakashi couldn´t move properly after teleporting a susanoo arrow and it´s almost as big as choujis finger.
Second, his size makes most random-ass copied jutsu useless.
Third, Kakashi isn´t known for his stamina while chouji has that(even though he´s fat)
Fourth, while kakashi is fast, i find it hard to believe he could just run and stab with a chidori before chouji reacts ok? He´s not Minato and chouji isn´t the slowest person around here.