User blog comment:PitchBlack696/Alatreon/@comment-3244594-20110131104346/@comment-3298463-20110206210730

A public service announcement:

The answer to the question "Who would win, White Fatalis or X", where X is any other monster, is ALWAYS White Fatalis. Because, until an official source says otherwise, he's the most powerful monster in all of Monster Hunter. Not Alatreon, not Raviente, not Lao. White Fatalis.

This probably goes for the other 2 Fatalis too.