I would say he clears Chapters 1-2 relatively easily, perhaps some trouble with Jevil and Spamton, and while I also think he would get through Chapter 4 and the final boss of that Chapter, it's the Knight that makes me think he might lose.
I think he does, the Knight is VERY strong and considering I'm assuming the Knight's not holding back, he'd get oneshot before he could even realize what happened