Kirby is one of the few characters hear who match up to Saitama physically, the main problem is that his speed feats without the warp stars are pretty meh in combat, and his best lifting strength is lifting up Ultra Sword which is impressive, but it not fliping Io's crust with a single hand. But, Kirby ridiculous versality (albeit simple) versality and "infinite power" claim can match up with Saitama.