The DNAtrix is a Trix used in the Sem 10 franchise.
Sem Foremin, with the DNAtrix as his left arm in 3.10: The Last Generation
Sem 10[]
The device was first seen in Sem 10 when it was found by Sem Foremin. He uses it to transform into hundreds of different aliens.
Sem 2.10[]
In Sem 2.10, it is revealed how Sem obtained the DNAtrix. The first alien he ever used was Waylighter, explaining his love for him.
3.10: The Last Generation[]
In 3.10, even more of the DNAtrix's origins are revealed. A Galvan named Axulo created the current DNAtrix as a prototype for a fully functional better DNAtrix, but Azmuth found out Axulo was copying him and destroyed all prototypes, expect the current one, which was saved by being thrown in the garbage by Axulo, and finding it's way to Sem Foremin. After a battle with a Vulpimancer, where Sem's left arm is torn off, Xion manages to save his left arm, and Axulo (Disguised as a doctor) hears about what happened. He quickly comes and repairs the DNAtrix's broken components (Which were broken when the DNAtrix fell to Earth), and also upgrades the DNAtrix to Sem's new left arm, and also adding a flashlight in it. Now, Sem Foremin uses it to fight the many evils of the galaxy, and even the universe.
Question for Ben 10[]
In Question for Ben 10, Ancy uses it as his Omnitrix.