|“||Owie-wee! Try all you want, I will never surrender the delicious Sparkle Water!||„|
Brigadier Mollusque-Lancuer III, or simply known as Molluesque-Lancuer, is the king of the Gushens and the boss of the Seaside Kingdom of Super Mario Odyssey.
Mollosque-Lanceur is a large purple octopus with six cyan blue tentacles, yellow eyes, and golden orange hair: consisting of eyebrows, a mustache, and hair around the waste of his head. He wears a primrose chapeau on his bald head, which he later ditches to protect his head with lava, as well as a white robe with a silver amulet.
The Bubblainians of Bubblaine enjoy their lives in the carbonated water of the Seaside Kingdom thanks to it being mixed with beverage from a large goblet called the Glass Tower, granting fortune, happiness, and romance to those who drink it, thus earning the name "Sparkle Water". When Bowser and his minions arrived, they charged Mollusque-Lancuer and his army of Gushens to drain all of the Sparkle Water from the Kingdom, driving away the Bubblainians away from the once again carbon infested water. Mollusque-Lancuer himself sits on top of the Glass Tower to drink away at the Sparkle Water gushing from the tip of the giant chalice using a bendy straw, while all exterior fountains are blocked with large corks.
When Mario arrives, he must find Ground Pound switches in the kingdom that control the four fountains loaded with corks. Hitting each switch pops out the cork from each fountain straight at Mollusque-Lancuer's head. Following the first cork shot, Mollusque-Lancuer grows a lava puddle on his head and spits explosive spiked shells into the water to stop Mario. Once the final cork strikes Mollusque-Lancuer, he falls from the Glass Tower to confront the plumber.
Mollusque-Lancuer hovers above the water and shoots out more explosive spike shells or drill-like cone shells at Mario. To defeat him, Mario must use Cappy to capture a Gushen in the area, using its water jet to rise in the air above Mollusque-Lancuer and rinse the lava from his head. From there, Mario can either continue using the Gushen or ground-pound Mollusque-Lancuer's head, although Mollusque-Lancuer can spin away to escape Mario's attacks. Upon defeat, Mollusque-Lancuer's head swells up and explodes, sending Mario and a Multi Moon to the top of the Glass Tower. With the octopus tyrant gone and the Sparkle Water back to normal, peace returns to the Seaside Kingdom.
In the Mushroom Kingdom rematch, the battle takes place in the sky instead of the sea, with only a small starting area with a Gushen and a floating Glass Tower as the only pieces of ground. Mario must remain hovering in the air at all times to battle Mollusque-Lancuer, but because it is raining, the Gushen's water supply always remains filled.
- Mollusque-Lancuer refers himself as the Dauphin of Bubblaine; "dauphin" refers to the heir to the French throne.
- The name "Mollusque-Lancuer" is French for "Mollusk Launcher".
- Mollusque-Lancuer is the only boss who can be fought throughout the entire kingdom and not in a restricted arena, making it possible for Mario to continue exploring without facing him first.
- It is possible for Mario to take shelter in one of the 8-bit areas during the boss battle, making Mollusque-Lancuer's theme the only boss theme that can be heard in an 8-bit remix.