TYB
Battletoads - Official Launch Trailer- Major Nelson Interviews the Toads!
When I was looking into the series because of something somebody posted a few weeks back, I was seeing what could be easter eggs related to these elusive targets.
This is all I got
I didnt know about the gray stuff.
Ghostbusters 2 and The Blob showed red goo so I would imagine thats out there somehwere too