Upgrade your Z-Saber skill to the fifth or sixth level to charge it faster. When fighting X second form, use the Ice Chip (obtained from one of your missions), charge your Z-Saber, climb any of the two vertical platforms, and jump-slash towards X's head. Be careful when jumping at X's head as you may hit X's hand.

When he shoots rings from his head, stand at one side of the platform. When you see rings start to appear from the top of the screen, dash to the other side of the platform. He then uses two attacks randomly, then shoots rings again. One attack is when he puts his hands about a foot apart with palms facing inward. A beam shoots out at the ground, and the ground catches fire. Jump on the spiked platform wall in the direction of the beam. When he points his palms toward the player and yellow spots start to blink on his hands, dodge this attack the same way you did the rings (dash to the other side of the platform immediately when the yellow beams shoot at you). In mid-attack, jump on the platform walls and jump off again with charged Z Sabre without an element. The other elements take about 16 hits to kill him, a normal Z Sabre only takes 8 hits, saving you time and health (if you dodge his hands and attacks successfully). It is also a good idea to take along Nurse Cyber Elves. Also, the Ice Chip is a nice element. Ice Chip needs 6 hits, Z Sabre needs 8, and Fire and Lightning both take about 12 hits.