The Theoretical Mall is a mall in space, and the only one open at Christmas time. Mordecai and Rigby have to enter it in order to get Pops a gift after they forgot to get one.
Powers and Stats
Tier: High 2-A
Name: Theoretical Mall
Origin: Regular Show
Attack Potency: High Multiverse level+ (Goes up to at least the fifth floor, and each floor is a different geometrical dimension)
Durability: Likely High Multiverse level+
Range: About 400,000 square feet (the size of an average superior-grade mall)
Weaknesses: Implodes when closing
Note: The building is non-canon and only exists inside of a story told by Moredecai and Rigby.