Smoky Progg

The Smoky Progg is a strange, mysterious creature that is able to be encountered on PNF-404. Captain Olimar has only encountered one of these creatures in his first visit to the planet, having this to describe about the creature:

"This hideous beast comes from a strange, hard egg. Its mollusk-like body is wrapped in an unpleasant gas that suffocates any Pikmin that inhales it. Attacking its head is successful, but it's best to eliminate in egg form."

Description
Smoky Proggs are, in essence, beings of death. They have only two legs pulling their bodies around, which almost seem "incomplete" with their lower parts turning into a gas-like substance. It also has two glowing eyes, which shift from red to green.

Smoky Proggs are born from large eggs, and it almost seems born with a desire for death upon others. In its strange state, many other lifeforms will suffocate if caught in the path of the Smoky Progg, and it is also capable of uprooting creatures to suffocate them. According to Captain Olimar's notes, it is shockingly intelligent and immediately attempted to find the root of the problem (finding the Pikmin Onions rather than attacking Olimar himself.

The Smoky Progg and Mamuta
There's been a lot of speculation on this strange creature, as any and all information about it was only given by Captain Olimar's studies. One theory that has been proposed is that it is a possible "malformed larva" to the God of Pikmin Mamuta. This claim is mostly supported by the contrast in behavior towards Pikmin: the Mamuta planting and caring for them and the Smoky Progg digging them up and killing them.

This has been in debate ever since the Smoky Progg's "discovery", arguing how little evidence there is to go off. Some even argued if the creature even existed or not, since only one was ever found.