>>44336161Void is infinitely more powerful than Arceus and is strong enough to simultaneously manifest itself in multiple dimensions and sometimes, multiple times in the same dimension (the SOUL forms are almost certainly linked to it as well and might be it semi-manifesting itself onto a dying or fragmented soul).
Kirby not only beat the shit out of it, he did it in such a manner that it's heavily implied he turned it into another Kirby or that he IS Void in an alternate manifestation and he's just breaking laws of time and space to fight his original form in a paradox loop.
Arceus wouldn't stand a chance.