Mario's Tunnel of Doom is the cave created by Mario. This tunnel is scary and doomy. "What the fuck is that?!" This article is a stub. You can help OnyxKing Wiki by expanding it. v - e - d OnyxKing67 locations Towns Mushroom Kingdom Mansions Luigi's Mansion • Peach's Castle • Waluigi's Mansion Places Bowser's Lair • Freddy Fazbear's Pizzaria • Grand Opening Bank • Here School • McDonalds • Mushroom Kingdom DMV • The Old XP • Mario's Tunnel of Doom Retrieved from "https://onyxking.fandom.com/wiki/Mario%27s_Tunnel_of_Doom?oldid=6296" Categories: Article stubs Locations Caves Community content is available under CC-BY-SA unless otherwise noted.