The Weapontrix is the a new version of the Ultimatrix. When the Ultimatrix is stuck on Weapon Mode for more than a week it recalibrates to become the Weapontrix.
The Weapontrix looks identical to the Ultimatrix except it is whitening color. The faceplate is also white but that's what it does when it is in Weapon Mode
Wit the Weapontrix Ben or any other user can recreate any weapon that has ever come in contact with it.