Bruxish

Bruxish (or ハギギシリ Hagigishiri in JPN) is the Gnash Teeth Pokémon. It was introduced in Generation 7 which is better known as the Sun and Moon era. It is a Water/Psychic Pokémon that doesn't have any evolution. It can be found in Routes 13, 14, and 15, (For S/M it can also be found in Secluded Shore (Fishing)) in S/M US/UM. For S/V, it can be found in the West Paldean Sea, the South Paldean Sea off the coast of the Secluded Beach, in the East Paldean Sea, and off the coast of Levincia. You cannot obtain Bruxish in SW/SH, even in both DLCs.

Bruxish is a Pokémon that is hated by fans for an unspecific reason/