Echo Echo is the Omnitrix's DNA sample of a Sonorosian from the planet Sonorosia.
Because his true form is made of living sound waves, Echo Echo's appearance is actually a small, white containment suit made of silicon, making his body a living amplifier.
One of his most noticeable features is a square appendage resembling an MP3 player behind his back with a port on it, decorated with a 10 symbol and what looks like cassette tapes on his lower legs. The green circle-shaped indents on the back of Echo Echo's hands are sound holes, and the inside of his mouth is also green with lines that give it the appearance of an amplifier. He also wears headphones so he would not be hurt by his own sonic screams.
Echo Echo now has black pants and white boots, and the Omnitrix symbol is located on his chest.
Powers and Abilities
Echo Echo can scream at audible to ultrasonic frequencies capable of overloading machinery, shattering steel and stopping projectiles in mid-flight.
Echo Echo has the ability to duplicate himself, much like Ditto, but different in that the clones are not linked to each other in any way, allowing entire groups to be knocked out without harming the rest and he can clone himself much faster than Ditto could.
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.
Echo Echo can create an echo chamber, where his clones attack from all directions and keep screaming until the target is knocked out or defeated. He can detect vibrations on the ground, his sound holes help him resonate and using his sonic screams, Echo Echo can locate objects/people, giving him the ability of echolocation.
Echo Echo can transmit sound waves through speakers, such as phones. He can use his sonic screams to create a force field. Echo Echo is quite agile, as he is capable of jumping exceptionally high.
Echo Echo seems to have more strength than his size suggests, as he can kick off the trunk door from the DX Mark 10 with one foot and is able to throw (about a meter) a Plumber Ship with the help of nine clones.
Echo Echo has a fragile body that can easily be destroyed in battle. Echo Echo's sonic screams can easily hurt his teammates' ears and he has a limit to the number of duplicates he can make, which depends on the amount of energy he has access to.