Ben eventually gains 5 DNA samples from the Andromeda Galaxy during the first season of Ultimate Alien. Overall, the Omnitrix contains DNA samples from throughout the Milky Way Galaxy, as stated by Azmuth in 'War of the World: Part 1'. When the faceplate is slid back, the Omnitrix's core is revealed. The faceplate is black with two green stripes forming an outline for the hourglass of the intergalactic peace symbol.

The New Omnitrix's face plate is now square instead of round, and has a white and green color scheme. In the same episode, he gave it to Ben because he deemed him worthy of wielding it after removing the original Ultimatrix from the latter's wrist. By the events of 'The Ultimate Enemy: Part 2', Azmuth had completed the New Omnitrix and claimed that he was working on it ever since Ben got the porotype nearly 6 years ago. He was planning on giving it to Ben, but it was not yet complete, and Ben's maturity needed to increase before he would be allowed to use it. The New Omnitrix was first mentioned by Azmuth in 'Map of Infinity'. The central component, the selection interface remains the same, while the watch band was replaced by a gauntlet-like band extending up to almost half of the wearer's arm (since the band's ability to morph its shape was not placed into it). Unlike the Omnitrix, the original Ultimatrix looked more like a gauntlet. The Omnitrix was destroyed in 'The Final Battle: Part 2' and replaced with the original Ultimatrix. When Ben is selecting his aliens, it shows the alien's hologram standing on the core. These colors signify the mode that the Omnitrix was presently in. The inside of the hourglass shape glowed in different colors at certain moments. When it recalibrated in Alien Force, the Omnitrix gained a more watch-like shape, a green wristband, became smaller and sleeker, and the face dial became black and green. Wyatt, this is due to the removal of a scratch guard that fell off after the events of Ben 10: Destroy All Aliens.

During the Omniverse flashback timeframe, the colors of the Omnitrix symbols have been changed from white and grey to green and black. When Ben selects his aliens, it shows the alien's silhouette. The Prototype Omnitrix was primarily black and grey in color, with a greyish black dial in the middle (like a watch face) which has a green hourglass shape (the intergalactic 'peace' symbol, also on Plumber's Badges and Galvan Prime) on it. The Omnitrix most commonly resembles a wristwatch.

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