@dankcushions
Yeah, I checked the sites myself and had no issue. I don't see how it could be the connection on the Pi, though, since the wifi works for anything I do via the GUI - both the main Retropie interface and the setup interfaces. Scraping, updating, etc, all works until I go into the terminal. I'll probably have to seek help elsewhere as I suspect that's still outside of your ability to assist.
Thanks for the help, though. I at least now know some stuff to look at should other problems arise in the future.