Clash House

The Clash house is the setting of the Virtual Boy game Mario Clash, little is known about it unfortunitly, but from what is known it appers to be a tower like building and has been attacked by the various monsters found in the game.

Mario fighting thornys in the Clash House

The building has many Warp Pipes in it and that is where the enemies are coming from (Mario Clash is based on Mario Bros). The Clash House also has many dangerous ledges that Mario could fall down, Icicles hanging from the celing, and walls made out of iron or another metal. It is possible that the Clash House was were the original Mario Bros was set but that is very unlikely.