The Clash Tower (Mario Clash)

The Clash Tower is the biggest tower you ever seen. Dozens of Koopa Troopas, Spinies, Spike Tops, Sidesteppers, and even Fighter Flies appear in there.

Mario Clash is from the Virtual Boy, if you don't know what is this location topic doing here.

*The topic turns gray and freezes in time*

*The topic returns to normal*