The season opens with Ben’s identity reveal. "Fame" establishes the new tone as Ben battles a giant fungus monster while trying to save a girl who is terrified of him. "Duped" shows Ben using Echo Echo to split into three bodies (Nice Ben, Smart Ben, and Jerk Ben) to attend a movie premiere, a football game, and a fight simultaneously. It’s a hilarious character study.
The most defining element of is the dissolution of Ben’s secret identity. Since the original series, a core tension of the show was Ben trying to live a normal life while hiding his powers. Alien Force maintained this secrecy, but the season premiere, "Fame," changed the rules of the game forever. Ben 10 Ultimate Alien - Season 1
refines the Alien Force trio but adds tension. The season opens with Ben’s identity reveal
However, the Ultimatrix is not without its flaws. In a nod to the original series' comedy, the device is frequently glitchy. It often gives Ben the wrong alien or transforms his teammates Kevin and Gwen into unintended forms. This keeps the tension high; Ben cannot rely purely on brute force and must often use his wits to survive when the technology fails him. This narrative choice reinforces the theme that the hero makes the tech, not the other way around. It’s a hilarious character study
Upon release, Ben 10 Ultimate Alien - Season 1 received positive reviews for its darker storytelling and serialized plot. Critics praised the Aggregor arc as one of the best villain builds in the franchise. However, some fans lamented the reduced screentime for original series aliens (like Four Arms and Heatblast) in favor of the new Ultimate forms.