From the Super Mario Wiki
An Airnapse is a more powerful version of the Napse located in Bowser's body in the Airway in the game Mario & Luigi: Bowser's Inside Story. It has a blue nucleus and a yellow coating. In battle, Airnapses will attack Mario and Luigi by throwing energy balls at them. They generally attack in the same way as their counterparts, but their attacks are faster and more powerful. They also have more defense than their cousins. They can also regenerate a fallen Airnapse if one of them dies, and they do so more often than a regular Napse. These enemies often fight with other Airnapses or with Air Cannons, Air Cheeps and Stonks. Of all the enemies in the Airway, the Airnapses are the only ones that don't possess any features of the Dark Star.
Names in other languages
|Air Napse, "pun" being part of the full name for Napse in Japanese, "Shinapun", itself a pun on "synapse".
||Pun on aero (air in latin) and molécula (molecule).
||Pun on Sauerstoff, meaning oxygen
||Put on Aero (Air) and 'Bolla (Bubble)