Empire Porky Building

This 100-floor skyscraper could be considered the "final dungeon" of Mother 3. It is the central attraction of New Pork City and it has all kinds of strange floors crawling with various enemies and inhabited by powerful bosses on the top floor. Lucas and company should enter the building after Miracle Yokuba's defeat in the Sewers.

Lobby
This is the first floor of the building and looks like a seemingly normal lobby. The room on the right contains a hot spring to revitalize the party before the long trip ahead. On the left is the elevator, which supposedly only travels as far as the 24th floor.

Concert Hall (Floor 24)
It may be full of Pigmasks and even the Fierce Pork Trooper, but the band DCMC is having their last concert here so they don't see any need to try and stop Lucas. The concert is interrupted by Porky's voice over the speakers, demanding that Lucas meet him on the 100th floor. However, Porky tampered with the elevators in the building.

Hippo-Launcher Zoo
The first of several fake 100th floors, this place is a zoo full of powerful Hippo-Launcher enemies which can only be fought if you run up to their faces. There's only one that actually must be fought, which a Hippo Researcher unleashes on Lucas.

Fan Room
The second of several fake 100th floors, this place is an easy, straightforwards floor with nothing to fight. It is the room where Porky's "Fan Club" meets (more like a harem) and it is also home to one more Oxygen Machine, a special land variety that looks like a Centaur.

Empire Porky Building Bathrooms
The third of several fake 100th floors. This is a maze of bathroom doors and hallways where Lucas will fight Pigmask Majors, Metal Attack Roaches and Men's Bathroom Signs. Towards the end of the maze Lucas may have a second encounter with the Ultimate Chimera. If he can outwit it and sneak into the room it emerged from he'll find an Awesome Ring in a present.

Locria's House
The fourth fake 100th floor holds the last magyspy shell. From what Lucas sees in the shell it is possible to determine who was actually the final magypsy.

Construction Site
The fifth fake 100th floor apparently isn't even finished yet. It's a series of metal and wooden planks crawling with Boa Transistors, Love Walkers, K9000s and Rhinocerockets. An interesting about this floor is that one of the workers says the building is a mix of wood and metal, similar to the title screen of Mother 3, an amalgamation of wood and metal.

Nice Person Hot Spring
The sixth fake 100th floor is actually quite close to the top. It may be the 96th floor of the building. It is a laboratory patrolled by Octobots (a returning enemy from EarthBound) Pigmask Colonels and Mecha-Lions. The Nice Person Hot Spring is the floor where people and animals are brainwashed by Porky. Once Lucas reaches the end of this floor there will be a doorway leading into the next room where there are no elevators but a flight of stairs leading to floor 97.