Echo Echo is a small white silicon-based alien whose body is a living amplifier, has a headphones connected to square appendage resembling an MP3 player in his back with a port on it decorated with a binary digit situated like the number 10, and cassette tapes-like on his lower legs. He can scream at ultrasonic frequencies, capable of overloading machinery and stopping projectiles in mid-flight; also can use echolocation; channel vibrations to enhance his power and transmit sound waves through speakers. He also has the ability to duplicate himself, but unlike Ditto, in that the clones are not linked in any way and can revert even if all duplicates are not re-integrated, which splinters the original's personality. With these skills, 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. Also, he revealed an ability to fly. The first time he appeared was to fight the Forever Knights' dragon robot in "Ben 10 Returns: Part 2".

In Omniverse, Echo Echo has 2 black stripes on the center of his ears. His Omnitrix symbols is moved to his forehead.

Echo Echo-Ben Ten Alien

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