A lot of appropriate creatures come from the new Gamma World. The adventurers have tangled with robots, vegepygmies, froghemoths, and suchlike.
Of course, Gamma World doesn't have everything, so I ended up making some creatures for this adaptation. As such, there are things like...
I paired that creature with several of the following...
...and not use it, could you? Naturally, I did. Statistics:
These creatures are primarily labeled as aberrant for whatever reason, but you can make them whatever you want.
Interested parties can read about the party's exploits aboard the crashed ship here: Part 1, Part 2, Part 3, Part 4, Part 5, Part 6.