I've never played the Genesis port, but it was one of the first games I played through on MAME when I got it (along with The Simpsons*, Teenage Mutant Ninja Turtles 1&2*, and Knights of the Round*). I never got to finish quarter eaters at the arcade and took my revenge with my #5 key at home. Wooohahaha!
http://gojira-otaku.livejournal.com/
*Of course, I own all the original cabinets and my having the ROM images are perfectly legal because of this (wink wink).