Airway (Mario & Luigi: Bowser's Inside Story)

Airway is the final area Mario and Luigi explore in Mario & Luigi: Bowser's Inside Story. It is apparently located in Bowser's lungs. The airway has all of Bowser's DNA and is the place where the Dark Star is fought. In order to progress through the Airway, Bowser must inhale a stream of ice from Blizzard Midbus's snout, and alternate in-between to get to the end of the area. The Dark Star slowly progresses through and takes in Bowser's DNA as it goes through. First, it acquires his fist, then his flame breath (but in a more dark flame than bright red), and finally his shell to ground pound. When the bros. finally make it to the area where they fight the Dark Star, he has the complete look of Bowser, without the legs. Advanced players that want to level up very quickly should battle the monsters in the Airway, as suggested by the Emoglobins that host The Gauntlet. The Emoglobin says: "...Wait, what's this globin here? You can enter the Airway? For you to quickly level up... You should grab your globins and fight in that Airway!"

Enemies

 * Air Cheep
 * Stonk
 * Airnapse
 * Air Cannon
 * Bone Thwomps (obstacles more than enemies)
 * Dark Star (boss)
 * Dark Bowser (briefly)
 * Dark Satellmite (help the Dark Star)

Trivia

 * If the player saves while the Dark Star is in the Airway, the last sentence in the save message says that the Airway is called the Air Space, the Japanese name for the Airway.
 * The airway is regarded as the best place to train the Mario Bros., as an Emoglobin in the Challenge Node states that the Mario Bros. can train quickly in the Airway.