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First appearance Mario & Luigi: Bowser's Inside Story (2009)
Latest appearance Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey (2018)

A Napse is a neuron-like enemy inside Bowser's body in Mario & Luigi: Bowser's Inside Story and Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey. They are located in the Energy Hold, and look like round red cells ringed by moving dendrites. Their name comes from "synapse", which is the junction between nerve cells.

A Napse will attack Mario or Luigi using electrical discharges that are colored either red, 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 color, so the player needs to keep an eye on the order the Napse has the energy balls. This attack is avoided by jumping. Another one of its attacks includes getting red and green energy balls from other Napses around it. Once it has obtained enough, it will shoot the energy balls at the bros. This attack is avoided by jumping. Touching the electric charges can lower their defense. This enemy can also multiply, but not as often as the Airnapse. However, when it multiplies, the Napse loses half of its remaining HP and its duplicate gets the other half of its remaining health. Napses take extra damage from fire, so the Fire Flower Special Attack is useful in taking them out quickly.

The idle form of the Bowser Memory ML found in the Memory Banks bears some resemblance to a Napse, however it acts different and has a mouth as well as bigger eyes.


Mario & Luigi: Bowser's Inside Story[edit]

Mario & Luigi: Bowser's Inside Story Enemy
MLBISNapse.gif HP 68 (102) POW 43 (108) DEF 34 (51) SPEED 43 (65) Coins 35 (53)
Level 15 Fire Double Burn? Double Battled by Mario and Luigi Location(s) Energy Hold
Dizzy? Normal Stat Down? Normal KO? Normal Experience 100 Item Drop Super Mushroom - 5%
1-Up Mushroom - 5%
Notice: The second set of numbers next to the enemy's HP, POW, DEF, SPEED and Coins are stat increases from the Challenge Medal accessory; a 50% increase for HP, DEF, SPEED and Coins earned, and a 150% increase for POW.

Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey[edit]

Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey Enemy
MLBISBJJNapse.png HP: 68 POW: 75 DEF: 56 SPEED: 43 Experience: 100
Fire: Critical Jump: Normal Hammer: Normal Battled by: Mario & Luigi Coins: 35
Burn: 2x Dizzy: 1x Stat Down: 1x Speed down: 1x Item Drop: Super Mushroom - 20%
1-Up Mushroom - 15%
Level:           15 Location(s): Energy Hold

Names in other languages[edit]

Language Name Meaning
Japanese シナプン
From 「シナプス」 Shinapusu, meaning synapse
Spanish (NOA) Napsis Napse
Spanish (NOE) Normácula From molécula (molecule)
French (NOA) Napse -
French (NOE) Synapiou From synapse and the childish suffix iou
German Synapsel Pun on synapse
Italian Multibolla From multipla (multiple) and bolla (bubble)