Ghoulix

The Ghoulix is a species of zombie-like cell puddle made of an infectious substance.

=In fanon games=

In Pikmin: Dark Forces
The Ghoulix serves as the boss of the Goolix Kingdom, a cave in Pikmin: Dark Forces. It is not particularly challenging; simply defeat it with Tech Pikmin, which are immune to the substance the Ghoulix is made of.