What do shar pei rottweiler mix dog look like?

You can never be specific because the dog is a cross breed meaning any colouring/features can vary.

For example one puppy from a Chow/Rott breeding could have the entire looks of a Shar-pei with Rott markings whearas a different puppy could have a Rott head, shar-pei tail and a mix of the two in body proportions and markings.

You can never be sure with a mix breed until the pup has matured some what after birth, usually around 5-10 months.