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XT4 is a type of multi-armed Villain that was originally a drone, and was designed in many clones.
He was first made as a working drone that would work in building items and also as serving a guard in various places. However, due to his poor design, he was designated to be deconstructed and his parts sold as scrap. However, when Speeda Demon headed to his homeworld Mechna, he shot darts inside the heads of all the XT4 clones, which turned them into deadly weapon-wielding fiends. The clones were boarded onto a large ship which was heading to the outskirts of Makuhero City to perform a raid, although they were stopped. However, it took several days to put a hault to their assault. All of the XT4 clones were sent to an isolated section of the Hero Factory Prison Center to serve a period of time there before would be deconstructed into scrap-metal.
However, when the Breakout occurred there, all the cells throughout the Prison Center were opened - allowing all the XT4 clones to escape. They they headed to Makuhero City with all the other Villains to perform their massive-raid.
The Vengeance Attack
The XT4 clones will appear in The Vengeance Attack.
He was replaced by the mysterious main antagonist in Millenial Shadow.
He has chainsaw teeth, a giant razor blade, day and knight vision eye,claw lazer, and two striking blades.
- There is a villain named XT5, however it is unknown if they are related or not
- Xon might have made them
- He may apart of the doom box