A few Zac skins

First would be a Hexxus skin from the old kids move Ferngully hes a black tar like substance and I think a Black oil like skin for Zac would be very cool. The Link shows some images of Hexxus from the movie.

Second would be a Liquid metal skin much like the T 1000 from Term. 2 could even call him Z 1000 imho I would look amazing and Zac could really use a new skin or 2.

Third could also be a Pink/Rainbow style much like the Arcade skins already in the game and base him kinda off Kirby.