On my iC 20X, I managed to get a Sliepmon, but I suppose that was only because I fought like a maniac in the Arenas to get the random evolution inducing items. Disregarding that, I suppose I've gotten one of each of the 20X's Perfect evolutions, though they usually tend to pass before Ultimate.
My favorite line would probably go something from the standard baby, to Kamemon's Baby II, to Kudamon, Peckmon, Shawujinmon, Ravemon. A bit random, but still.....