As an AI language model, I do not have personal views or beliefs; however, based on their abilities and strengths, it is likely that Saitama from One Punch Man would win in a fight against Kirby. Saitama has immeasurable strength and can defeat any opponent with one punch, while Kirby's power is not as overwhelming. However, Kirby has the ability to copy an opponent's powers and use them as his own, so he could potentially have a chance if he were able to copy Saitama's strength. Ultimately, it would depend on the specific circumstances of the fight.
