I saw a couple of blogs and his name is listed as Phucdat Nguyen... I'm surprised the show would let it in if it was fake!! But I'm sure its a joke and I guess he's semi-famous:
The Adventures of Carbon Atoms - Phucdat aka Goofball on so you think you can dance

Aha!! I just found it and his real name is Danny - shame on sytycd for missing that one!!!
YouTube - atomicgoofball's Channel

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