Sonorosians
Living soundwaves that had an enrichment-based symbiotic relationship with other lifeforms that relied on echolocation. When the first extraterrestrial visitors arrived, they used hypervibrations to break apart rocks and assemble them into silicon "bodies" based on the aliens' forms and technology to directly communicate with them on comfortable terms and help them out.
They can create multiple bodies by reshaping silicon-based material and splitting their collective consciousness into them.
Azmuth was not able/saw sense not to replicate this ability in the Sonorosian form in the Omnitrix, so duplicate bodies are created instead by the Omnitrix's energy-matter conversion mechanic.











