VS. Iron Mam is a stage in the sub-gameDyna Blade that appears in Kirby Super Star and its remake. It isn't a normal stage, however; it is a stage that moves around the map. It is unlocked once the player completes Mallow Castle. This stage is entirely optional; it is not necessary to complete the stage to clear Dyna Blade (except for Meta Knightmare Ultra, where it will start immediately after Candy Mountain is completed). Upon entering this stage, Kirby must fight the mid-bossIron Mam - he is unable to exit to the map unless he defeats her. After Kirby defeats Iron Mam, he can inhale her for the Fighterability. Once this stage is completed, however, it can no longer be accessed unless the player starts a new game on the sub-game.
In Kirby Super Star Ultra, a 1UP will appear after the mid-boss's defeat.
Mid-bosses are enemy characters that are stronger than regular enemies but not as strong as bosses. They are typically fought mid-way through levels and bar the player's progress further. Usually, during a fight with a mid-boss, the camera locks in place and Kirby cannot leave the battlefield until he has won the fight.
VS. Iron Mam might be based on the Hammer Bros. stages from Super Mario Bros. 3, since both VS. Iron Mam and the Hammer Bros. stages are remarkably similar in function:
They both appear as mid-bosses on the world map, and if the character runs into them, the stage would forcibly start.
They are both stages that require all enemies to be defeated to complete the stage.
They both have unique music for each stage that would be reused for future games in their respective franchises in similar situations.
The music that plays here is a remix of the Egg Catcher and Arena theme from Kirby's Adventure, and has become the main mid-boss theme in the franchise ever since.
