Aura

An aura is a hazard that takes the form of misty blue energy often instantly fatal to Pikmin, and sometimes enemies and leaders, exposed to it but may have different effects or be harmless overall. More often than not, a source of aura energy, be it an enemy or obstacle, must be neutralized by using a foreign object such as a bomb rock or boulder to avoid its effects.

=In fanon games=

In Pikmin: Shipwrecked Stargazers
In Pikmin: Shipwrecked Stargazers, aura is an incredibly rare hazard, only wielded by the Borealic Blowhog, which only appears in the penultimate area and the final cave. When Pikmin touch the substance, it envelopes their stem and courses through their bodies, causing their eyes to glow blue. There are only a few seconds in which the whistle can be used to save the Pikmin, or else they will violently explode in a flash of blue energy, alongside the sound of a firework going off.