Oh yea remember that one villain Gate that will appear in the Australian Neo-Yakuza base? Well he has one servant.
Nightmare Zero (or other wise known as Zero Nightmare.)
Nightmare Zero: (From X6)

Zero Nightmare uses imperfect variations of attacks used by Zero in X5, but with random shot speeds. Most notable is a delay when he swings his saber, where he holds it above his head before coming down, and his use of Genmurei Kai, a "revised" version of an attack used only by Awakening Zero. However, this variation is not instant kill, and is only one wave, rather than two. Its is also subject to the same odd randomness in speed. He can also teleport, and does so frequently in battle.
Curiously, and ironically, Zero Nightmare is actually weak to Zero's Z-Saber , causing him to flinch and cry out in pain when hit with it, after which he immediately teleports away from X to another spot. Note that this only work if X is standing when swing the Z-Saber, and if he is jumping or on a wall (either sliding down or hanging on using the Shadow Armor), Zero Nightmare will just be damaged normally
Zero Nightmare seems to be mentally unstable, almost a botched project. At times he would ask X where Zero was, seeking him. Other times he would claim to be Zero himself, and yet other times, he would yell "BLUE LIGHT MUST KILL" among other incoherent phrases in a senseless rage. No matter what, though, X would deny his claims or snap at the "cheesy fake," and Zero Nightmare would instantly go into a rage bent on killing X, or claim X has gone Maverick and that he will retire him. While some memories and attack patterns seem to have remained from different periods of Zero's life, the clone was not complete in any respect, and was therefore easy for X to see through as a forgery of his longtime friend. In this RP Nightmare Zero is more mentally stable, and is highly loyal to Gate, and Gate only. Listening to only his commands. When someone else tries to give him a command he simply doesn't respond, just stands there like a statue until Gate tells him to do something. Nightmare Zero however can become mentally unstable after sustaining enough damage.
Nightmare Zero's Movepool:
Teleportation: Zero Nightmare can warp around the room in a dashing stance.
Z-Saber Slash: Zero Nightmare hold his Z-Saber up and after approximately half a second, he swings it.
Z-Buster Shots: Zero Nightmare shoots two shots that go straight ahead.
Thousand Shots: Zero Nightmare shoots a large barrage of charge shots from his Z-Buster.
Denharei: Zero Nightmare launches a energy wave that is semi-homing from his saber after using Z-Buster.
Shin Messenko: Zero Nightmare punches the ground, making several energy projectiles fly up from the floor.
Genmurei Kai: Zero Nightmare attacks with a weaker version of Awakening Zero's final attack, firing off single giant energy waves at varying speeds.