>>54368927Bulbapedia time
>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, tldr: the " slut with bedroom eyes" look is due to the likely intentional feminine look due to the Kamuy-huci refence.
Also a common theme of regional forms is contrasts. Makes sense that the regional would go for an opposite vibe then the original.