Energystool

The Energystool is a unique Sporovid due to the blue aura pulsing through its body. Unlike other Sporovids, it cannot possess Pikmin with its spores. However, it makes up for this by having a much more devastating attack. It can spray a blue mist, which is fluids in its body, combined with the aura within it's body. This results in a deadly mist. This mist kills all types of Pikmin, making it dangerous to deal with. It is not known how this creature generates the aura within its body, making it another science mystery.

Pikmin
Just swarm it with a group of about thirty Pikmin. When it trips, throw Pikmin at the soft underbelly. However, it is wise to use Captains, as the mist it sprays kills all types of Pikmin.

Captains
Just punch it. It is a lengthy process, but minimizes Pikmin casualties.