Gardie

Growlithe is a quadrupedal canine Pokémon. It has orange fur with black stripes along its back and legs. The fur on its muzzle, chest, belly, and tail is beige, as is an additional tuft of fur on top of its head. Growlithe's coat is noticeably longer on its chest and tail. It has gray eyes, a black nose, and large, round and triangular ears with beige interiors. Its forepaws have two visible claws, while its hind paws have three toes each. Each paw has a brown pad.

Growlithe is a friendly and loyal Pokémon that will fearlessly defend its Trainer and territory from harm, even against larger, stronger enemies. In particular, it has been known to fight with over territory. It will fiercely bark at, bite, and chase away any perceived threat. Otherwise, this obedient Pokémon will wait motionlessly until given an order. It has a long history with people, as its bones have been found in Stone Age ruins. In the wild, Growlithe can be commonly found in grassy plains.

Growlithe also has a powerful olfactory sense. If it detects an unknown smell in its territory, it roars to flush out the intruder. It can smell the emotions of others, and never forgets a scent. However, strong, unpleasant smells can disable Growlithe's sense of smell for short periods, as seen in the Pokémon the Series episode The Case of the K-9 Caper! (EP054). As mentioned in Pokémon Sleep, Growlithe is known to bark at anyone who approaches it while sleeping.

Forms
Growlithe has a regional form: Hisuian Growlithe.

In Hisui, Growlithe's fur is dark orange-red, while its mane and tail are light gray, and its muzzle is a light tan. The fur is made out of igneous rock components. Its mane covers its eyes and extends below its head, ending with three curls. Its ears are round and square with light orange-red interiors. It has a small horn made of rock on its head, and its tail is curly.

Growlithe's Hisuian form is the result of it being exposed to volcanic activity within the coastal highlands it lives in during Hisui's early times. Hisuian Growlithe's soft and insulated fur allows it to survive the cold weather of Hisui. Although Hisuian Growlithe's horn is made of rock, it is fragile and breaks easily, so the Pokémon rarely uses its horn unless needed. Hisuian Growlithe live in pairs, and are known to be vigilant when guarding their territory. Hisuian Growlithe take much longer to bond with humans because they have lived apart from humans for a long time.

Evolution
Growlithe evolves into .
Hisuian Growlithe evolves into Hisuian Arcanine.

(Source: Bulbapedia)