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The alien Echo Echo can scream at ultrasonic frequencies
Rath, an angry alien like an anthropomorphic tiger without a tail with superhuman strength
Ampfibian, alien resembling a jellyfish extraterrestrial from the Amperia planet. Ben 10: Ultimate Alien
BenWolf is a Loboan, an alien whose DNA was added to the Omnitrix and that can emit an ultrasonic howl capable of shattering rock

Ben 10 and some of the aliens of the Omnitrix coloring page


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