Simisear are as known for their voracious appetites as for the heat of their flames, and are not particularly large pokemon, despite devouring enough sweets to approach the weights of a Snorlax. Their digestive system uses these treats to feed their flames, and the sight of the family pet Simisear devouring bags of delicious candy while being restricted to a couple pieces in the name of their health has inspired jealousy in generations of Unovan children.
It is said that a few enterprising children, noting how even wild Simisear were often fed by the neighborhood (as much to prevent them from setting fire to their houses as from any compassion) decided to dress up in Simisear outfits in the hope of acquiring candy for themselves. Some were captured early and answered with a scolding by their own parents – one which frequently saw the Simisear join, while others were so successful they learned the hard way that human and Simisear biologies are extraordinarily different and no amount of candy can let them breathe fire, and buried the rest of the candies in the costume's tail for staggered consumption over the course of the next month.
In time, other children began to emulate them, and as the custom evolved from heist to ritual, a few chose different pokemon as their costumes. Today the holiday of Halloween is often associated with ghost pokemon, for young children have often been fascinated by all things scary, and in this global era it has become somewhat merged with the Kalosian festival of Pumpkaboo and Gourgeist, which falls on the same date. But whenever one witnesses the wild Simisear of Unova ringing doorbells for candy and fuel in the hopes of being mistaken for trick-or-treaters, it is hard to forget this holiday's origins.