Sylvester is the genderswapped version of Sylvia.
Sylvester is a zbornak like Sylvia. He is just like Sylvia, but has dark blue skin and red hair.
Like Sylvia, he is tough but more tougher. Like his female counterpart, he is tempered, full of action and shows a soft side for Wanda. He is also athletic.
- He is voiced by Kathleen Barr, the same person who voices Kevin on Ed, Edd n Eddy. In fact, he sounds similar to him but more deeper.