Impressions of fluff in a limestone formation reveal that Larvesta's ancestors were not always fire pokemon, for no pokemon capable of self-ignition would have required such an elaborate winter coat. More controversial, although difficult to reject, is the thesis that the cold weather was itself a casualty of Larvesta's evolution; no one today denies that Cretaceous warming is contemporaneous with the first appearance of Volcarona in the fossil record, and one astounding theory suggests that Slither Wing developing into its modern form was itself the cause of the period's ice-free poles.
The distance between tufts of fluff suggests that either these pokemon lived in swarms or that these pokemon, despite many parallels to modern Larvesta, were in fact larger than not only Volcarona but any other bug pokemon known from modern times. If the population estimates from the Socarrat formation are extrapolated to all potential habitat in Paldea, and if early Volcarona shared the biomass of their immediate progenitors, then the theory of Volcarona-induced warming does indeed check out – but skeptics note that no Volcarona fossils, no matter how early, have ever approached the projected size of Slither Wing.
Slither Wing must have been a menacing insect in its own right, more than capable of holding its own against the rock and grass pokemon who dominated the period, or of at least scaring away Aerodactyl. But the advent of stronger flying pokemon spelled the end for insects of this size; they were powerless against predation from Archeops and its many descendants, who surpassed their ancestors in visual acuity. Evolution demanded a new means of camouflage and protection from the air to survive, and we can be certain that Slither Wing's descendants found it in a new larval stage and in the development of nuclear fusion.