User blog comment:Shadowunleashed13/Reject Riot: Debug Mode Act 2/@comment-5008885-20130326013301/@comment-477304-20130326181101

Nack was his original name in the western markets, but it was changed to Fang in Sonic Drift 2/Racing and Sonic the Fighters. Fang's poster in Sonic Generations reads: "Nack the Weasel AKA Fang the Sniper" suggesting that Nack is his real name and "Fang the Sniper" is a moniker, just like Doctor "Eggman" Robotnik.