Nick Colletti is a character that appears in the video "PINK GUY X GETTER X NICK COLLETTI".
In this video Pink Guy is seen with Nick Colletti (A guy in a brown suit) and Getter (A guy in a green suit.) Not much is known about Colletti. He currently has his own rap carrer. Colletti has only been seen in one video, it is unknown if Colletti will ever be seen ever again.
It is possible that Nick Colletti is a Mr. Negi since he wears a brown lycra suit.