I've moved many a classic Bally/Stern game in my 2011 Prius. Head barely fits in passenger seat but it fits. Any DMD pin should fit the same way. No need to remove the seat BUT I have scuff marks on my dash and my headliner from hastily stuffed games. Also visibility out the right side is damn near nothing.

I moved my Spider-Man in a SAAB 9-2X (Impreza wagon basically) with the head disconnected and the head and body both fit in the back. the head fit alongside the body. I'm guessing that might be possible in the Prius as well but I don't want to disconnect all that crap again to check.

Be forewarned though, those connectors have probably never been disconnected to you run the risk of breaking a bunch of them. Be ready to re-pin some of them.