TheHall of Horrors is an attraction of theKoopa and Kailey Circus inMonster Mix-Up. Its tent is entirely gray, making it stand out from the bright colors of the other tents, and its sign is written with red letters.Mario,Luigi,Toad, and theMushroom King can visit the attraction while looking for a missingPrincess Toadstool. The king suggests going there since it seems like a natural place to hide a kidnapped individual; also, he enjoys being scared. If the group enters it, the entire area is pitch black. Mario suggests finding a light switch, leading a raspy-voiced individual to flip it. The tent illuminates to reveal a captured Toadstool, an army ofKoopa Troopas, andMorton Koopa Jr. at the switch. The group of heroes is quickly subdued, which leads to aGame Over.

• Monster Mix-Up