Thread:IndigoPengi/@comment-4220590-20190106183314/@comment-4166811-20190106203652

I rely on translation tools, online dictionaries etc.

The guide says:

チャオの突然変異体.

Chao no totsuzenhen'i-tai.

https://jlearn.net/Dictionary/Search?by=jpn&type=s&term=%E7%AA%81%E7%84%B6%E5%A4%89%E7%95%B0%E4%BD%93

Basically, "mutation of Chao". The yellow profile box uses the same terminology for his species - "チャオ (突然変異体)".

The Master Emerald isn't mentioned, nor is any other cause of the mutation.

There's a translation of his Sonic Channel profile here, by Sonic Retro forum member Windii: https://pastebin.com/cqe2vqij