Chris Brown's manager made good on his threat to add defamation to his lawsuit against Brown, and says there's no way he could have stolen the singer's cheddar.
Hours after Brown posted 2 videos saying Mike G had been fired for stealing his money, the now estranged manager filed new legal docs. In the new lawsuit, he says he's never had access to Chris' money because another business manager is solely responsible for finances.
Even though in the videos, Chris says he'd canned Mike over the cash ... we're told Mike claims he never got a termination notice until AFTER he filed his lawsuit.
We broke the story ... Mike G's also suing for assault, battery, false imprisonment and breach of contract after what he says was a bloody beatdown by Chris.