Well, that certainly makes this battle a ton different. I'll tell you why.

Since it's now been proven thet Cloud is susceptible to paralysis, the fight is over. Even if Cloud can paralyze Ness, he'd have to use Cross Slash, and that's a short-range attack which would be particularly hard for Cloud to land. On top of that, Ness can continue to use PK while paralyzed, therefore allowing him to use his powers to heal himself. Cloud is basically helpless until cured.