It is said to be capable of running over 6,200 miles in a single day and night. The fire that blazes wildly within this Pokémon's body is its source of power.
(From Bulbapedia)Arcanine is a quadruped, canine Pokémon with an orange pelt marked by jagged black stripes. It has diamond-shaped ears with beige insides, black eyes, a round, black nose, and two pointed teeth protruding from its upper jaw. Its head, muzzle, and chest are covered in shaggy, beige fur, except for two oval sections around each eye and ear. Long tufts of fur grow behind its knees and around its ankles. Its underside is black, and it has a billowing, beige tail that is bent in the middle. Each paw has three toes and a round, pink pad.
Arcanine is a fiercely brave and loyal Pokémon. It is capable of running 6,200 miles (10,000 kilometers) in 24 hours with a speed and grace reminiscent of flight. Additionally, the move Extreme Speed was its signature move in the past. Arcanine has long been admired for its beauty and speed, and anyone who hears its bark will grovel before it. The source of its power is a flame blazing wildly inside its body.
(From Bulbapedia) Arcanine is based on the Ryukyuan シーサー shisa, or 狛犬 komainu, mythical creatures inspired by lions, tigers, and dogs. Statues of them in pairs are used as guardians that invite good spirits and repel evil ones. It could also be based on the Haetae, a mythical fire-eating dog with similarities to lions and tigers.
(From Bulbapedia) Arcanine is a combination of arcane and canine.