Herdier is a quadrupedal mammalian canine Pokémon. Most of its body is brown and some parts are dark blue. It has very large ears and what looks like a mustache and forehead hair in the shape of a "W". It has small neat paws and what seems like a blue cover over its body and tail.
Herdier have a docile temperament in general. Although they're not talented at battling, they observe and analysies their opponets calmly before giving them an unexpected attack. Also, they detest evilness and care for their trainers deeply, and they know how to teach their teammates effectively, so they're good choices to be mentors of young Pokémon.