Muk

Muk appeared in 1996 video game called Pokémon Red & Green. Muk is a Sludge Pokémon. Muk really stinks, but some Trainers are fond of it, terrible smell and all. Recent efforts to reduce pollution and clean up the environment have also reduced this Pokémon's numbers.

Alolan Muk
Muk's bright and colorful markings are the result of chemical changes in its body, caused by its diet of all sorts of garbage. It's generally a pleasant and friendly companion, but if it gets hungry, it can turn destructive.

Appearance
Muk is a large purple mass of sludge, toxic fluids, and other filthy materials. It has two large arms that capture prey and its eyes are barely visible through the sludge.

In Alola, Muk’s appearance changes drastically. Rather than being just purple, Alolan Muk is a mixture of bright color tones that consist of pink, green, and yellow; this gives Muk the appearance of an oil slick. In addition, crystals formed by solidified toxins cover most of Muk’s mouth and hands that gives Muk the appearance of having claws and sharp teeth.

In terms of both body size and weight, a Kantonian Muk is larger but lighter while an Alolan Muk is smaller but heavier.