Echo Echo is a small humanoid like alien. He has a circular head, white and black skin, green eyes and mouth, and has two ears that resemble a speaker with cords connected to his body. His arms are directly connected to the speakers. He wears white boots and black armbands. Underneath the suit, Echo Echo is made up of stabilized energy carried by sound waves.
The Omnitrix symbol is located on his forehead.
Ultimate Echo Echo's appearance looks much more mechanical than in his normal form. He is a slender humanoid with blue skin with several patterns of black lines, several speakers around his body.
His Ultimatrix symbol is located on his chest.
- Ultrasonic Screams- Echo Echo can scream at ultrasonic frequencies, and the wind and sound released can bring most beings to their knees. He cannot be harmed by his own sonic screams.
- Self-Duplication- Echo Echo can clone himself multiple times by splitting apart the sound wave energy that make up his body and forming a new suit around them.
- Echolocation- Echo Echo can locate people or objects using his sonic waves.
- Sound Production- Echo Echo has sound holes on the back of his arms to help him resonate.
- Change Back- When multiple Echo Echoes are out, they can all change back to Ben.
- Levitation- Echo Echo's resonate discharge allows him to levitate a few yards into the air. However, he cannot fully fly.
- Containment Suit- Echo Echo's outer body is actually a containment suit, while is inner body is made of living sound waves.
- Frail Body- Echo Echo has a fragile body and can be destroyed easily.
- Small Size- Due to his rather small size, Echo Echo is rather weak when it comes to hand-to-hand combat.
The Sonorosians are bipedal silicon-based biomechanical beings that were created and manufactured by the Olimarans. Overtime, they evolved sentience and when the planet began to die, fled underground where they've created building sites, waiting for their masters to return.
- In Chapter 1: Alienated (Page 26–29), Echo Echo defeated Danny and awakened a Way Bad.
- In Chapter 2: The Lonely Ghost (Page 5), Ultimate Echo Echo can be seen in a flashback facing off with a mutated Kevin.
5 Years Later
- Chapter 1: Alienated (first appearance)
- Chapter 2: The Lonely Ghost (cameo)
- Chapter 8: Risen (by Albedo; cameo)
5 Years Later
- Echo Echo's 5YL design is based off of unused concept art from Ben 10: Ultimate Alien.
- Ultimate Echo Echo is Hurshie's overall favorite transformation.
- Ultimate Echo Echo is the first Ultimate Form that Kuro has made official artwork for in the 5YL art style.