– Albedo, Ben's Galvan rival, returns to Earth. Instead of attacking, he starts a live stage show featuring alien actors to raise money to build a machine to fix his human DNA.
– Classic villains like Zombozo, Rojo, and Charmcaster target Ben’s family to get revenge. Kevin and Gwen step up to protect Ben's parents.
The series concludes with the two-part episode . In a climactic battle, Vilgax betrays and absorbs the power of the ancient evil Dagon, becoming a god-like being. Ben defeats him using the legendary sword Ascalon , restoring peace. The finale marks a major turning point as Azmuth, the creator of the Ultimatrix, takes it back and gifts Ben a new, stable Omnitrix.
– Techadon weapon masters send a continuous wave of customized custom robots to assassinate Ben. Each robot adapts perfectly to the alien Ben used to destroy the previous one. ben 10: ultimate alien all episodes
Ben 10: Ultimate Alien is the third installment in the original Ben 10 animated continuity (following Ben 10 and Ben 10: Alien Force). It aired 2010–2012 and follows teenage Ben Tennyson after his identity as a superhero becomes public. With the Ultimatrix upgraded into the Ultimatrix/Ultimatrix’s successor device (the “Ultimatrix” evolving into the Ultimatrix→Ultimatrix Ultimate forms in-story), Ben gains “ultimate” versions of many aliens and faces new threats while balancing fame, friends, and responsibility.
– To stop Aggregor from obtaining the third map piece in the magical dimension of Ledgerdomain, Gwen convinces the team to forge a dangerous alliance with Charmcaster.
– Ship goes missing to save his former owner, causing tension between Ben and Julie. – Albedo, Ben's Galvan rival, returns to Earth
Ben's identity is revealed to the world by a young fan named Jimmy Jones, changing the dynamic of the franchise forever. Map of Infinity Forge of Creation " (S01E15/E16):
The team tracks Aggregor into Ledgerdomain, the magical home dimension of Charmcaster, to secure the third piece of the Map. Episode 15: "Perplexameron"
– Gwen uses dangerous magic to save Charmcaster, only to discover a dark kingdom rule. Kevin and Gwen step up to protect Ben's parents
– Victor Validus, a scientist infested by alien nano-chips, seemingly returns to attack Ben. Ben must look into his past to figure out how the hive-mind survived.
– Vilgax breaks his alliance with the Flame Keeper's Circle and absorbs Dagon's powers.