Typhlosion is a bulky mammalian Pokémon with a long, yet agile body. It is classified as a quadruped, but it is capable of bipedal movement. Most of its body is cream-colored, but its back and the top of its head are a dark green-blue. It has a short, rounded snout and small, triangular eyes and ears. When its mouth is open, its sharp canine teeth and thick tongue are visible. Each of its paws has five digits and there is a coarse, spiky fringe of fur along its rear. Across the back of its neck, there are several red spots that can produce fire.
Typhlosion is capable of making anything go up in flames when angered and creating explosions by rubbing its fur together. The heat it generates when ready for battle creates a shimmering haze that can also be used to hide itself. Though it is rare in the wild, it can be found living on grasslands.
Hisuian Typhlosion's appearance is believed to have been influenced by the energy emanating from Mount Coronet at the center of the Hisui region. Its ears droop beside its head. The fur on its back is a purplish-blue color, and extends to the front of its neck, forming a collar pattern. It has fire-producing spots all around its neck, covering the collar pattern, and these spots produce flames that wisp in a bright magenta-red color.
Hisuian Typhlosion has graceful and refined movements, and a gentler, more pacifistic nature compared to Johtonian Typhlosion. It can often be seen staring into space; it is assumed that as Hisuian Typhlosion does this, it looks at the flow of life energy and searches for wayward spirits and lost souls to eat. It is believed that Hisuian Typhlosion purifies spirits with its flames as it eats them, before it guides them back to the afterlife where they belong. Despite its peaceful nature, Hisuian Typhlosion can lose control of its emotions when sufficiently angered, and can unleash ghost flames that can incinerate its opponents until nothing remains. It can emit a total of 108 ghost flames from the spots on its neck. Once unleashed, every single ghost flame attacks its opponents while taking on the appearance of ferocious beasts.
Typhlosion's body shape is similar to that of animals of the Mustelidae family, while the flames on its body closely resemble the quills found in porcupines. It is also based on volcanoes, which is reflected in its Pokédex entry, triangular sprite, and the ability to learn Smokescreen and Eruption.
Hisuian Typhlosion appears to be based on psychopomp figures, common in many mythologies. More specifically, it may be based on Kamuy-huci, the Ainu goddess of fire and the hearth, whose fire is said to act as a gateway between the human world and the spirit world. The ghost flames on its neck are reminiscent of a necklace of magatama beads, which are associated with various spiritual beliefs, including the ancient Japanese practice of burying them in graves along with the deceased as offerings for the gods. Like Spiritomb, the specific amount of its ghost flames, 108, is considered sacred in Buddhist numerology and coincides with the number of beads in a Japamala. Hisuian Typhlosion's coloration may be a reference to Johtonian Typhlosion's Shiny coloration in Generation II; conversely, Hisuian Typhlosion's Shiny coloration is similar to Johtonian Typhlosion's normal one.
Typhlosion may be a combination of typhoon and explosion. It could also derive from Typhon, a monster in Greek mythology who was said to be buried under the volcano Mount Etna after his defeat and who also had a mate named Echidna; or Eulipotyphla, a hypothetical mammalian order containing shrews and hedgehogs.
Bakphoon may be a combination of 爆風 bakufū (blast from an explosion) and typhoon.