Growlithe in depth
The stone dog at the gate
The design’s origin is not just any dog, but a shisa: the statues from Okinawa, half dog and half lion, placed in pairs on roofs and entrances to ward off evil spirits. Their Japanese relative from the main islands, the komainu, serves the same purpose at Shinto shrines. That is where everything you see comes from — the cream-coloured mane on its chest and head, the black stripes on its back, the planted, front-facing stance, and above all that compulsion to defend a territory against intruders that the Pokédex repeats entry after entry. It is not a guard dog because someone trained it to be one; it is a guardian given the shape of a dog.
The Japanese name, ガーディ (Gardie), points in the same direction. English builds it from two descriptive pieces: growl, the sound, and lithe, meaning agile or flexible. French goes for a different pun, Caninos, combining canin with os, bone.
When to use the stone
The Fire Stone creates the only real dilemma this species has, and it is a dilemma the game does not explain. If you use it as soon as you get it, you lose the entire learnset listed above: Crunch at level 32, Take Down at 36, Flamethrower at 40, Roar at 44, Play Rough at 48, Reversal at 52 and Flare Blitz at 56. That is almost thirty levels of moves left behind.
In practice, there is a natural stopping point at 40. Flamethrower is the best special attack it learns on its own, covers what it needs to cover and arrives at a point when the team is still developing. Waiting until 56 for Flare Blitz makes less sense, because the same move is available by TM and because 120 power with recoil fits better on a sturdier body. Holding out until 48 is worthwhile if you want Play Rough straight from the learnset.
Red yes, Blue no
In 1996, it was a version exclusive. It appears on Routes 7 and 8 and in the Pokémon Mansion in the Red version, while in Blue it can only be obtained by trading; FireRed and LeafGreen repeated the exact same distribution. Its counterpart on the other side was Vulpix, and the contrast between the two is deliberate: one comes from the guardian shisa, the other from the kitsune, the trickster fox of Japanese folklore. Two Fire-type quadrupeds, two opposing mythologies and the same Fire Stone to evolve.
The version that came from Hisui
The regional variant appeared in Pokémon Legends: Arceus with a change to Fire and Rock typing. The design explanation is the region’s volcanic activity: its fur, a darker, redder orange, incorporates igneous rock components, and a fragile horn grows from its forehead that it rarely uses. The light-grey mane replaces the cream one.
The change in typing is not cosmetic. Fire and Rock adds weaknesses to Water, Ground, Rock, Fighting and Steel, five exposed flanks, in exchange for resistances the original form does not have. It evolves with the same stone as its Kanto counterpart, and in Scarlet and Violet it cannot be found on the map: it arrives as a gift from Perrin.