Napse

A Napse is a neuron-like enemy inside Bowser's body in Mario & Luigi: Bowser's Inside Story. It is a cell covered by a ring of dendrites that moves freely around its red rounded body. It will attack Mario or Luigi using electrical discharges that are colored either red, blue, or green. One of its attacks includes summoning two energy balls colored red and green. It will then spin around turning both the red and green balls into blue ones. The energy balls will then hit the respective brother, depending on its former colour, so the player needs to keep an eye on the order the Napse has the energy balls. This attack is avoided by jumping.