Eiyseeyuu

The Eiyseeyuu is a species of adult pupilgeist that is intangible until it spews younger members of its species.

=In fanon games=

In Pikmin Evolution
The Eiyseeyuu is a species of adult Pupilgeist, being the matured form of the Eiysee. It is a large bulbous white mass of tissue with two stubby arms and a blank faceless canvas for a head, having an overall ghostly appearance. This species of Pupilgeist spends its time in the dark recesses of various dens, drifting and undulating in the air. However that act is very hard to see as the primary ability of this creature is to become both completely intangible and invisible, meaning it can't be damaged or seen on the naked eye. You can see glimpses of it when it occasionally flashes as it turns its direction, but otherwise it is eerily unnoticeable. Due to being indestructible when invisible, you can't really do much to the Eiyseeyuu until it decides to reveal itself on its own accord, ad the only reason it will do that is to perform its signature attack. When it gets the opportunity to reveal itself it will show a red eye on its face, however this isnt its actual eye, rather it its mouth, which spews out a legion of small Eiysees from. These Eiysees are different from the regular ones encountered due to the fact that they have paler bodiers and don't leave behind a corpse when killed, meaning the Eiyseeyuu can't be used to farm for more Pikmin. The Eiysee spawned by the Eiyseeyuu are completely the same otherwise, so they still retain their excellent leaping abilities and ravenous appetite. However if your quick on the draw, the Eiyseeyuu revealing itself will prove to be its downfall. You see the Eiyseeyuu loses its invulnerability when it spews enemies, meaning it can be taken down and attacked by all Pikmin types. Kelp Pikmin are particularly good against this creature as they can hook onto the ghost's body with their long leaves, making them easier to kill. Eiyseeyuus are quite tanky enemies, so they make take two or three cycles to fully slay. This magnifies when it goes into half health as the creature spews Eiysees quicker and in larger hoards. However like the children it summons, the Eiyseeyuu carries over its crippling weakness to water. Bodies of water for example show the Eiyseeyuu's shadow, allowing it to be better tracked, splashing water on the creature also makes it tangible as well as cause it be stunned. It also helps that the Eiysees it summons can also be instantly killed by water, so you should hold onto your blue syrups. When killed the plasmatic membrane of the Eiyseeyuu disappears revealing a marshmellow-like corpse one can collect for their ship, though be careful as other Eiysees can enter the corpse if left unattended, reviving it once again, so make sure you kill all the Eiysees as well as to not repeat an annoying fight.