Soudesu. (It looks like...)

So for "soudesu", my textbook doesn't tell me if I can out a noun before soudesu. I want to say "my dog looks like Chewbacca". But I don't know how to write that. "Chewbacca o soudesu" ???

"~Sou da" can't be used for nouns.

Watashi no inu wa Chūbakka no you da.
Chūbakka mitai da.
Chūbakka ni niteiru.
Chūbakka ni mieru.
etc, etc...

Furthermore, you can't use "~sou da" to describe appearance of what you really see, even when used with adjectives. For instance, you can say "kashiko sou desu (looks like clever)" when you see a dog, but you can't say "ooki sou desu (looks like big)" or "kuro sou desu (looks like black)". ("Kuro" is the stem of an adjective "kuroi", not a noun, in this case.)