Ben 10: Ultimate Threat

Vilgax, Aggregor and Albedo have join forces and seek revenge, Ben has all of Earths heroes and villains to joined forces against the threat. Even, few of his transformations

It's the first movie of the Ultimate Alien series.

Main Characters

 * Ben Tennyson (voiced by Yuri Lowenthal): Hero of the Ultimatrix.
 * Gwen Tennyson (voiced by Ashley Johnson): Ben's cousin and Manacaster
 * Kevin E. Levin (voiced by Greg Cipes): Gwen's boyfriend, Ben's old rival and best friend.
 * Max Tennyson/Grampa
 * Plumber Kids
 * Helen Wheels
 * Manny Armstrong 
 * Alan Albright
 * Tetrax Shard (voiced by Dave Fennoy): A Petrasapien Omnitrix/Ultimatrix Guardian and a friend of Ben, he returns to help Ben again against.
 * Azmuth (voiced by Jeff Bennent): Creator of the Omnitrix.
 * Ziro Gree (voiced by Dante Basco): A alien hybrid Polar Manzardill from Ben 10: Ultimate Alien: Alien Kombat.
 * Isis Talon: A female Appoolexian and Ziro's girlfriend. She ressembles Intress from Chaotic: Dawn of Perim.
 * Hype Zone (voiced by Tom Kenny): A famous celebertiy Citrakayah and same race as Fastrack. he reutrns and helps Ben save his planet, Kevin and him still want to settle their match.

Villains

 * Vilgax
 * Albedo
 * Aggregor
 * Unlikey Allies: The villains of Earth have joined the heroes to stop Vilgax, Aggregor and Albedo from destorying the world.
 * Dr. Animo
 * Clancy
 * Arget
 * Rojo
 * Rojo's gang
 * Ssserpent
 * Circus Freak Trio: Circus villains returns to Ultimate Aliens series and now, they help heroes of Earth and even though they have no choice.
 * Acid Breath (voiced by Dee Bradely Baker): Leader of the Circus Freak Trio, he has the ability to project corrosive acid from his mouth in the form of either a vapor.
 * Frightwig (voiced by Cree Summer): A pale skin woman with a tight-fitting body suit, and five orange tentacles for hair. The tentacles are extremely powerful, giving her strength equal to that of Thumbskull.
 * Thumbskull (voiced by Jeff Doucette): A large man with a head shaped like a thumb (complete with a fingernail-like hairstyle on his forehead). He also has incredible strength (though inferior to that of Fourarms), but limited intelligence.
 * Mr.Sonic Singer (voiced by Neil Patrick Harris): A teal/white version of Way Big with blue long tail, yellow eyes,teal hands, black spiky hair, legs and arms, wearing a dark blue suit, black shoes and pants. After being free again, he was so happy to see Siren and apologized to Ben about his evil plan. He and Siren went on a date at end of the movie.
 * Siren (voiced by Grey Delise): A villainess with sonic scream wearing a purple hooded jacket covering her eyse, black dress and fingerless gloves.

Aliens Used

 * Rath 
 * Fasttrack
 * Ditto
 * Sonic Singer (accidental (he wanted Heatblast) and still has a Vocasaur DNA in Ultimatrix.)
 * Benmummy
 * Clockwork
 * Eyeguy
 * XLR8
 * Swampfire 
 * Water Hazard 
 * Graviton 
 * Shocksquatch
 * Goop
 * Feedback
 * Alien X