I know not a lot of people care about this, but the Hotel Mario prototype that was found by a Youtuber was posted to the internet archive this morning.
I figured I'd add it to MAME, and submitted a pull request which was just approved.
MAME's emulation is buggy, and it works, but the audio giltches or just goes fully silent. The best way to play this is to start a game right away. #mame#hotelmario#mar10
PSA Nintendo (US store, at least) has a ton of Mario games on sale right now if you’ve been holding out for something. I’m finally taking the plunge on Luigi’s Mansion 3.