Jellian J. Jellswell XIII (Boss)

Jellian J. Jellswell XIII is the final boss of Mando-Lynn. It takes place in Jellswell's underground Water Pumping Room located beneath his office. Defeating him unlocks the "Jelly-Fish Out of Water" achievement.

Pre-Battle Dialogue
Mando and Lynn enter into the dark Pumping Room, where they see Jellswell facing away from them. As Smoldoor closes behind them, Jellswell remarks by telling Mando and Lynn how long it's been since they've started their journey to defeat him (which, in reality, is the amount of hours the player has spent playing the file.)

Phase I
Jellswell starts the battle on the ground, jumping to the ceiling in an attempt to wrap his tentacles around Mando and Lynn to sting and temporarily immobilize them, then hitting them with his cane. To defeat him, when he attempts to grab the player, run around him in a circle, which will get his tentacles stuck in a knot, giving the player the opportunity to get a hit in. Repeat this until he goes into Phase II.

Phase II
Jellswell, now injured, changes costume and presses a switch that remotely turns off and on the lights, and operates the water pumps to force himself through large pipes to avoid being attacked. Mando must use his Night Vision ability to detect where Jellswell is by the yellow glow of his eyes while a few Tinkers attack. Mando must then increase the pressure of the pipe he is swimming past in order to force Jellswell out. Now stunned, Mando has the ability to get a few hits in before Jellswell jumps back inside.

Phase III
After forcing himself through the pipes, Jellswell comments on how he feels like he had a good stretch, and starts performing various martial arts moves in a different costume.

Phase IV
Jellswell, now angered, changes costume, then pulls his legs up into his suit, revealing a funneled jet-engine like jetpack. Jellswell starts to fly around, attempting to pick up and drop Mando into the outside water ring.