Echo Echo (Earth-68)

This is the version of Echo Echo that appears on Earth-68, the universe owned by Dioga beta. Echo Echo is a Sonorosian from the planet Sonorosia. His Ultimate form is Ultimate Echo Echo.

Appearance
Echo Echo is a small, white alien whose body is a living amplifier. He is actually living sonic waves contained in a suit made of silicon. 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. His voice originally sounded very high-pitched and tinny, but became slightly lower.

In John Smith 10, he has his UAF appearance until Omniverse, where he has his Omniverse appearance

In Jane Smith 10, she has the Omniverse appearance, with pink eyes instead.

Dimension 1 (John Smith 10) appearances
Echo Echo was unlocked after scanning the villain Sonogram.

By John

 * Crunch Time (first appearance)
 * Vicktor: The Spoils (John Smith 10)
 * Revenge of the Swarm (John Smith 10)
 * The Ultimate Enemy Part 3 (John Smith 10)
 * John Smith 10 Christmas Special

By Julie

 * A Knight to Remember (John Smith 10) (goesUltimate)

By Winston

 * The Ultimate Enemy Part 1 (John Smith 10)

By Ultimate John

 * The Ultimate Enemy Part 3 (John Smith 10) (x2)

By John

 * The Big Tick (John Smith 10) (first re-appearance)
 * Ultimate Aggregor (John Smith 10)
 * Map of Infinity (John Smith 10)
 * Forge of Creation (John Smith 10)
 * "I Decree"
 * Duel of the Fates
 * The Clone Wars (John Smith 10)
 * Ultimate Weapon (John Smith 10)

By Metal John

 * Trip to Naboo
 * Metal John (episode) (by Metal John)

By Ultimate John

 * The Ultimate Battle Part 2

Distant Worlds
By Ultimate John
 * Fight (first re-appearance) (x2; used by Ultimate John and by clone 2 & 3)
 * Leaf 12
 * Doctor in the House (used by Ultimate John)

By Ahmad

 * Incarcecon Breakout, Part 2

By John

 * Human (John Smith 10) (goes Ultimate)
 * Caldia (goes Ultimate)
 * Dactyl and the Hunter

By John

 * Ghost of a Battle (first re-appearance) (goes Ultimate)
 * The Final Battle Part 1 (John Smith 10)

By Warmatrix Drone

 * Darkness and Power (goes Ultimate)

By Ahmad in John's body

 * Ahmad Smith 10 and John 15, Part 2 (first re-appearance)

By John

 * War with the Titans (by clone 2)
 * Prophecy (John Smith 10)

By John

 * Vilgax's Power (first re-appearance)
 * Omni War

By Ben

 * Omni War

By John

 * Disney Castle(first re-appearance)
 * Twilight Town
 * The Grid

By Vexen

 * Replica Program (Replica)

By Marluxia

 * Beauty and the Beast

By Albedo

 * Fistful of Clones (first re-appearance) (goes Ultimate)

Dimension 777 (John Smith 10: Final Fantasy) appearances
Echo Echo first appears with Ripjaws, after the fusion alien Echojaws is split.

Summoned by Shinra

 * Break In

By John

 * Travel (JSXFF)
 * Blessing of Artemis
 * Junkyard
 * Forgotten Capital (goes Ultimate)
 * Healing (JSXFF) (goes Ultimate)
 * Phantom's Wrath Part 3

Dimension 3 (Jane Smith 10) appearances
Echo Echo is a member of Jane's original 10. She is one of the most used alien forms.
 * The Life of a Teenage Shapeshifter
 * You've Got a Friend in Me
 * Side Effects (Jane Smith 10)
 * Absolute Power Part 1 (Jane Smith 10)
 * Jane's Christmas Nightmare