Echo Echo

Echo Echo is a Sonorosian alien from the planet Sonorosia.

Appearance
Echo Echo is a small white alien whose body is a living amplifier. One of the most noticeable features is a square appendage resembling an MP3 player behind his back with a port on it - decorated with a binary digit situated like the number 10, and what looks like cassette tapes on his lower legs. It was also revealed in Fool's Gold that Echo Echo is made out of silicon which allowed him to defeat Decka.

Powers and Abilities
Echo Echo can scream at ultrasonic frequencies capable of overloading machinery and stopping projectiles in mid-flight. He also has the ability to duplicate himself, not unlike Ditto, but different in that the clones aren't linked in any way, allowing entire groups to be knocked out without hampering the rest. His cloning capabilities seems limitless. By combining these two aspects, Echo Echo can create a "Wall of Sound", where he and his clones can redirect projectiles back to their source by bouncing them off of strategically placed clones, and "Echo Chamber", where he and his clones attack from all directions, and keep sending out sonic screams until the victim is knocked out or defeated (In a circle, as seen in Above and Beyond).

Echo Echo can also use echolocation, as seen in Alone Together, and can channel vibrations to enhance his power, as seen in Undercover.

He can transmit sound waves through speakers (such as phones), as seen in Grounded. Echo Echo can also detect vibrations in the ground. They have to go back into one body before transforming back to Ben like Ditto or else the clones become multiple personalities as seen in Duped. Echo Echo is also quite agile, using his size as an advantage against large opponents.

Ultimate Alien
He first reappeared in Duped, only to create three different Ben's. He made another small appearance in Map of Infinity, to transform into Ultimate Echo Echo. he reappeared in Nor Iron Bars a Cage for an actual appearance to stop the sonic electro collers on the prisoners. This is the first time that he uses his sonic screams while talking.

Ben 10: Alien Force

 * Ben 10 Returns: Part 2 (first appearance)
 * Kevin's Big Score
 * Darkstar Rising
 * Alone Together
 * Good Copy, Bad Copy (used by Albedo)
 * Undercover
 * Grounded
 * Unearthed
 * Fool's Gold
 * Vreedle, Vreedle (selected alien was Humongousaur)
 * Single-Handed
 * Trade-Off
 * The Secret of Chromastone
 * Above and Beyond

Ben 10: Ultimate Alien

 * Fame (video footage)
 * Duped x2
 * Map of Infinity
 * ...Nor Iron Bars a Cage

Video Game Appearances

 * Ben 10: Alien Force The Video Game (He is playable on NDS)
 * Ben 10 Alien Force: Vilgax Attacks
 * Ben 10 Alien Force: The Rise of Hex
 * Ben 10 Ultimate Alien: Cosmic Destruction

Trivia

 * He is made of silicon.
 * He is the first of Ben's aliens to answer his cellphone, Rath was the second.
 * Echo Echo is the third alien with the self-duplication ability. The first being Buzzshock and the second being Ditto.
 * Dwayne McDuffie confirmed it's his favorite Ben 10: Alien Force alien.
 * As it was stated that upon recalibrating that the Omnitrix gave Ben new alien forms similar to those he had in the original series, Echo Echo could be given in place for Ditto's self duplication, Benwolf for the sonic screech and Grey Matter for his size.
 * "Wall of Sound" is an unlockable combo move in the video game Vilgax Attacks.
 * Sometimes when Ben transforms into Echo Echo he immediately duplicates.
 * While Echo Echo has self-duplication, he loses it when he evolves.
 * Like in Duped, it is possible than when three Echo Echo clones go ultimate at once, there will be duplicates of Ultimate Echo Echo. It is unknown whether Ben will ever think of this, let alone try it.
 * Unlike Ditto, when one of Echo Echo's clones are injured, it has no effect on the others. One example of this is when Echo Echo's clones are put to sleep by Argit, the others remain awake. Supposedly this means that if one clone dies the others will live, not the same for Ditto however.