Yeah, that. It might be unused, but honestly, I’d like to see them used.
Here’s the photos of alt. rash I found (all low-quality phone-taken stuff, in hyperlinks for spoilery stuff.
First Costume (Green)
Second Costume (Purply)
A pic of Rash’s victory cutscene
(or, you know, you could also check that other thread as well that I forgot about, higher-def pics: here