Ultimate Echo Echo

Ultimate Echo Echo is the evolved form of Echo Echo in Ben 10: Ultimate Alien. Ben first became Ultimate Echo Echo in Map of Infinity to help his friends get through the traps at the temple.

Appearance
His appearance is now more robotic than his previous form. He now he has blue metal skin, fifteen blue, removable speaker-like components attached to his body, an overall rounded design, and longer arms and legs. Also his power control pack is replaced with a a marking resembling a cassette tape. His voice is now more robotic-sounding, similar to a speaker. His mouth doesn't move when he speaks. Ultimate Echo Echo is also taller; about Ben's height, and has stumped feet.

Powers and Abilities
Like Echo Echo, Ultimate Echo Echo controls and manipulates the power of sound. He can duplicate his discs. When Echo Echo has duplicates around and he goes ultimate the duplicates turn into sonic discs. He has evolved to expend much less energy by sending out the floating amplifiers at his joints to project incredibly strong and powerful sonic blasts, which at full force can knock someone out and shatter metal, iron, and steel with relative ease.

Ultimate Echo Echo also has the power and ability to fly by projecting sound waves around himself, and can even fly fast enough to create a deadly sonic boom and open a hyperspace window. He can also create invisible force fields out of sonic waves that are strong enough to contain a blast from a mini-nuclear bomb. He was also able to survive a blast from said bomb, but was slightly damaged.

The sonic discs he produces can also multiply, letting him use an exceedingly powerful move called Sonic Doom, where his discs surround the enemy and fire a full sonic blast, with the potential to be fatal.

He is able to fire sound waves from the discs when they are still on him, demonstrated when he blasted Kevin through several buildings at once with the discs on his hands.

Apparently, he can generate some sort of atmosphere, because he was able to use sonic abilities in airless space in the Enemy of my Enemy.

He possesses some degree of super strength as seen in Map of Infinity when he helped Kevin lift a heavy stone door, before changing to Four Arms.

Ben 10: Ultimate Alien
He makes his first appearance in Map of Infinity where he is used to fight off the Necrofriggian temple guardians (Big Chill's species). Later in the episode he is seen a flying a few times to avoid the acid and other traps. He also helps them defeat the two headed fire ice dragon, which was easy for Ultimate Echo Echo. When they reach the map they have to lift the wall so he then turns into Four Arms.thumb|right|188px

He appeared again in order to stop a Nuclear fusion grenade from going off in The Enemy of My Enemy. He also appeared in Absolute Power: Part 2 to stop Ultimate Kevin, and he actually did defeat Kevin making Ultimate Echo Echo one of Ben's strongest aliens. His fourth appearance was in Viktor: The Spoils, where he was used to stop the surface-to-air missiles attacking the jet. He made a brief cameo at the beginning of Basic Training defeating Trombipular.

Ben 10 Ultimate Alien: Cosmic Destruction
Ultimate Echo Echo is a playable alien in all versions of the video game. But unlike the cartoon, Ultimate Echo Echo has five fingers instead of just four. His normal form is also playable.

Translation

 *  Portuguese : Eco Supremo / Echo Supreme
 *  Norway : Ultimat Ekko Ekko
 *  Polski : Ostateczny Echo Echo (Ostateczny - Ultimate, Echo Echo - Echo Echo)
 *  Spanish(Spain ): Ultra Eco,Ultimate Eco(Ultimate, Echo Echo)
 * Spanish(Latin America): Eco Eco Supremo (Supreme, Echo Echo)
 * French : Ultime Echo (Ultimate Echo Echo)
 * Romanian : Ecou Ecou X
 *  Dutch : Ultieme Echo Echo

Ben 10: Ultimate Alien

 * Map of Infinity (first appearance)
 * The Enemy of My Enemy
 * Absolute Power: Part 2
 * Viktor: The Spoils
 * Basic Training

Trivia

 * Out of the 3 most drastically changed ultimate forms (Swampfire, Spidermonkey, and Echo Echo), He seems to be the most drastically changed ultimate form for these reasons:
 * 1) His voice is completely different unlike Ultimate Swampfire's.
 * 2) However, he doesn't retain any phenotype minus his eye color (physical appearance) whereas Ultimate Spidermonkey retains his purple-blue hair. He has no sign of anything left from his devolved form unlike Swampfire and Spidermonkey who still have the same feet or color scheme.
 * Ultimate Echo Echo has 4 fingers, but in the Cosmic Destruction art of him, he has 5.
 * It is revealed on the Cosmic Destruction site that Ultimate Echo Echo can fly faster than Jetray, even while later on Jetray proved to be able to enter hyperspace.
 * Kevin asks him why his name wasn't "Ultimate Echo Ultimate Echo", a joke on how the original Echo Echo's name includes "Echo" repeated twice.
 * Unlike his regular form, he cannot duplicate himself. (As confirmed on the Cosmic Destruction site and by Dwayne McDuffie). It is explained that the reason behind this is because he's evolved to expend less energy by only duplicating his sonic disks (allowing him to fire more powerful sonic blasts).
 * In The Enemy of My Enemy, it is revealed that Ultimate Echo Echo can survive in the vacuum of space.
 * So far, he is the Ultimate Forms who has been used by Ben the longest. However, this was only because he was on a planet where he would die without protection.
 * Originally his voice was going to be less robotic than Echo Echo's, but it was later changed to make it a deeper version of Echo Echo's.
 * Ultimate Echo Echo does not have a mouth that moves when he talks like his normal form does.
 * Cartoon Network's site wrongly shows that Ultimate Echo Echo can still duplicate himself.
 * In the first episode he appears in, a coloring error shows his fingers are black when he transforms, but were blue when he takes the sonic discs off, and back to black when he is shown throwing them and his shoulders were blue then black. Ultimate_Echo_Echo_TKO.jpg
 * He is in the cartoon network game TKO. His special moves are Sonic Disc and Sound Barrier. His Super Move is Sonic Doom.
 * Recently, Ultimate Echo Echo was added as a new alien for Cartoon Network's Ben 10 Alien Force: Game Creator.
 * He is one of the three ultimate aliens on Ben 10 Game Creator.
 * Ultimate Echo Echo is the last alien used by Ben in season 1 of Ultimate Alien.
 * When Echo Echo transforms into Ultimate Echo Echo with duplicates in existence, the duplicates transform into sonic discs.
 * Just like how Ben made up "Wall of Sound" with his normal form, he made up "Sonic Doom" with the evolved form. 
 * He seems to be made of metallic based structure (either Iron, Nickel or Cobalt), as seen when Kevin magnetized him in Absolute Power and managed to hurt him.
 * He is the only Ultimate Form so far to have not been defeated by any enemy.
 * When Ben transformed into Ultimate Echo Echo in Viktor: The Spoils, his voice sounds different from his normal voice.
 * Ben used this from to stop Kevin because none of his aliens other than Way Big could stop him.
 * During all the transformations of Ben turning into Echo Echo to Ultimate Echo Echo, Ultimate Echo Echo never goes back to Echo Echo again, he goes straight back to Ben.
 * Ultimate Echo Echo has a similarity to the Batman Beyond villain, Shriek with powers and looks.
 * Ultimate Echo Echo's voice is similar to that of the Decepticon Soundwave in Transformers.
 * He's the first Ultimate to almost kill an enemy.
 * Ultimate Echo Echo has an exosuit in Project Exonaut.