X... I dunno, its hard to be cool when you hang out with a guy with long blond hair and a boob-light. Sure, said guy is a sword toting machine of nasty infectious death, but come on... a boob-light?! It also doesn't help that X eventually turns himself into a fairy.
Randi, from SoM, might be more evenly matched with Crono. Both use swords; though while Crono could also use magic, Randi's sword was more powerful and had those fun sword tech thigns. Both travel with two friends only. Both fought giant monster thingies that wanted to destroy the world. Both probably ended up marrying princesses in a manifestation of the Han-Solo Complex. Both wear headbands, baggy clothing, and have uncommonly large and spiky hair. Crono had Gato, Randi had Niko.