Hydrogush 4000

The Hydrogush 4000 is a big yellow machine that spews water, much like FLUDD. However this machine is bigger, and as such it is capable of producing vast amounts of water. It was invented by Professor E. Gadd in Mario & Luigi: Partners in Time. The professor used it to extinguish the lava caused by the eruption of Thwomp Volcano. At the very end of the game, it is discovered that baby tears can be used to counteract the Shroobs. Professor E. Gadd alters the water's chemical makeup to be the same as the babies' tears. The machine spews water all over the Mushroom Kingdom of the past, ridding it of every trace of the Shroobs.

Trivia

 * For some reason, the babies were crying inside Yoob, but the tears didn't hurt Yoob at all.