Momowarou "Pecharunt"

About

Pecharunt is a dual-type Poison/Ghost Mythical Pokémon introduced during Generation IX, in the Mochi Mayhem expansion.
It is not known to evolve into or from any other Pokémon.
It is often viewed as the leader of the Loyal Three. It is associated with Ogerpon.

(Source: Bulbapedia)