Nicholas is a friend of Cyborg's who plays basketball and eventually gets his leg replaced with an artificial leg.

Nicholas originally hails from The Super Powers Team: Galactic Guardians, where he was played by BJ Ward (makes you wonder why Cyborg didn't get a female voice actor in the show as Nicholas was the same age as him. I bet Cyborg would've been Soleil Moon Frye's breakout role if so) but had a Chuckie Finster (Christine Canavaugh) kind of voice. Try and emulate that.