Fiery Stage

The Fiery Stage, also known as Bowser's castle or the castle, is the final stage in Mario Pinball Land. It can only be accessed 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 final boss of the game.

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

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

Main room
The main area of 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. 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 and rendering him vulnerable. After hitting Bowser three times, he rolls into a ball and can be knocked around the room before being launched out of his castle, ending the game.

Armored Koopa room
The Armored Koopa room is accessible via the 21-★ door in the main room. It features a hole located at the center of the room, as well as three Armored Koopas that can be defeated by being knocked into a wall. Defeating all enemies yields the player a Star.

Pokey room
The Pokey room is accessible via the 23-★ door in the Armored Koopa room. It features two enchanted obelisks and four Pokeys. Defeating all four Pokeys triggers a rematch with Egyptian Koopa. Defeating the boss again yields the player a Star.

Cheep Cheep room
The Cheep Cheep room is accessible via the hole in the Armored Koopa room. It features six Cheep Cheeps swimming in a circle, as well as two cannonball bomb hatches. Defeating all Cheep Cheeps triggers a rematch with Porcupuffer. Defeating the boss again yields the player a Star.