Whismur

Whismur (ゴニョニョ Gonyonyo) is a -Type Pokémon. It is a Basic Pokémon that can evolve into Loudred. Its special ability is Soundproof. Usually, its cries are like quiet murmurs. If frightened, it shrieks at the same volume as a jet plane. It can evolve into Loudred starting at Level 20.

Trivia

 * Whismur and Loudred both have Sound Icon patterns on their backs, Whismur's means low, Yet Loudred's means Mid volume.