Fiery Stage

The Fiery Stage, also known as Bowser's castle or the castle, is the final level in Mario Pinball Land. It can be accessed only while Mario is in possession of a Star Key, which can be used to unlock one of the four boss statues, or after all Star Keys are collected, which unlocks the rest of the stage. Flying Shy Guys and Armored Koopas are found defending the castle, as well as each of the previous bosses fought. Bowser is the boss of the stage and the final boss of the game.

Areas
NOTE: Unless otherwise marked, all names are unofficial.

Starting area
The starting area features four boss statues depicting Petey Piranha, the Egyptian Koopa, Porcupuffer, and Big Boo. After each Star Key is brought to its statue, the door to the next areas is opened. Afterwards, three Flying Shy Guys can be found in the area, and defeating all of them yields the player a Star.

Main room
The main area of the Fiery Stage is accessible via the gate in the starting area. The room features a Sky Cannon and Toad's tent, as well as five Flying Shy Guys. Defeating all of them yields the player a Star.

Boss room
The boss room is accessible via the 15-★ door in the main area. In it, Bowser is fought, alongside two Thwomps, each chained to a cog. Bowser wanders around the room until he finds a spot to jump on. His landing disables the flippers for a few seconds, possibly causing Mario to be sent out. If he exits the room, he is forced back to the starting area. Every time Mario hits Bowser while he walks causes him to rebound to another part of the room. Hitting Bowser while he stands stops him from doing his jump. By hitting each cog multiple times, Mario is able to lift the Thwomps. Activating the Blue Switch at the center of the room causes the Thwomps to hit the ground, stunning Bowser temporarily and allowing Mario to hit him. After Bowser is hit like so three times, he rolls into a ball, and the player must use the flippers to knock him around the room while making sure Mario also stays in the room. The player must hit Bowser toward the wall on either side enough times to launch him out of his castle. Afterwards, Mario saves Princess Peach, and they go back to the Fun Fair to ride the roller coaster.

First Armored Koopa room
The first Armored Koopa room is accessible via the 17-★ door in the main room. It features a helmet-wearing Monty Mole in the upper center, as well as two Armored Koopas that can be defeated by being knocked into a wall. Defeating both Armored Koopas yields the player a Star.

Goomba room
The Goomba room is accessible via the 19-★ door in the first Armored Koopa room. It features six Goombas moving in a circle, and defeating them all triggers a rematch with Petey Piranha. Defeating him again yields the player a Star. Afterwards, a ? Block with two Mega Mushrooms appears in the room.

Boo room
The Boo room is accessible via the 25-★ door in the first Armored Koopa room. It features four Boos, and defeating them all triggers a rematch with Big Boo. Defeating the boss again yields the player a Star. Afterwards, a ? Block with two Pipes appears in the room.

Second Armored Koopa room
The second Armored Koopa room is accessible via the 21-★ door in the main room. It features a hole located at the upper center of the room, as well as three Armored Koopas. Defeating all enemies yields the player a Star.

Pokey room
The Pokey room is accessible via the 23-★ door in the second Armored Koopa room. It features two enchanted obelisks and four four-segment-tall Pokeys. Defeating all four Pokeys triggers a rematch with the Egyptian Koopa. Defeating the boss again yields the player a Star. Afterwards, a ? Block with two bolts of Lightning appears in the room.

Cheep Cheep room
The Cheep Cheep room is accessible via the hole in the second Armored Koopa room. It features six Cheep Cheeps swimming in a circle, as well as two trapdoors. Defeating all Cheep Cheeps triggers a rematch with Porcupuffer. Defeating the boss again yields the player a Star. Afterwards, a ? Block with two Invincibility Stars appears in the room.

Golden room
The golden room is accessible via the 35-★ door in the second Armored Koopa room. It features four enchanted obelisk-like objects and a ? Block with two Yoshi Eggs. The Egg Mark is also found in this room. This room's Bonus Tower and golden egg reward Mario with more points and coins than any of the other ones.