Monstune is a Pokémon that's based on a quicksand monster. Its body is entirely made up of white sand; it has two arms with no visible fingers on each hand, a swirl on its forehead, a large open mouth with a large sandy yellow tongue, and two white eyes with black pupils.
Monstune create pits of quicksand to trap Pokémon and people. There are often signs warning of their habitats, but sometimes those sink into their pitfalls, as well.
Unlike Sandster, Monstune doesn't like to flee, and instead of being merely passerby, Monstune likes to trap people and Pokémon by creating quicksand pits. There usually are signs warning of Monstune in the area, but those will sometimes sink into the quicksand pitfalls, as well.
Monstune cannot be found in the Wild, so you must Evolve a Sandster in order to obtain one.
Shiny Coloration Differences
For Shiny Monstune, the white sand turns bright yellow, while the tongue turns bright yellowish-orange.
Monstune create pits of quicksand to trap Pokémon and people. There are often signs warning of their habitats, but sometimes those sink into their pitfalls as well.