Originally posted by ODG
Bullsh1t. I'd battlezone that any day of the week. Xavier combats Phoenixforce hosts, engaged Abstracts like Ego and Galactus (twice), unites and throws planetary population consciousnesses (3x), mindphucks computer intelligences, scanned/communicated across galaxies, and shuts down high heralds like cake. All this is all [b]without Cerebro.If you thought his best feats came with Cerebro, you're sorely misinformed. And Cassandra completely crapped on Xavier, while he was amped with Cerebro. J'onn would have to stand on a high-chair to kiss Cass' buttcheeks. [/B]
I'd like to see scans for the galaxies and Ego(although I can counter that with guys like Mageddon and Dr Destiny) feat. And as long as we're discussing galaxies, MM has scanned a galaxy as well in Heaven's Ladder. As far Galactus goes, the only 2 instances I know of are Secret Wars and the Skrull homeworld's destruction, and in both cases Xavier actually failed to do anything to him. Compare this to J'onn entering the Specte's mind and forcing him into the Astral Plane(JLA#35). On that note I am willing to take you up on your BZ challenge.
From what I have seen, Cerebro gives amplifies his telepathic abilities on a planetary scale, hardly beyond J'onn's capabilities. Skill-wise it can go to Cass, power-wise I am sure it goes to MM. Hence they're peers in my book.