>>52391788It’s for lore reasons
>Past Paradoxes have first and second stage Pokemon>Slither Wing looks and has similar stats to Larvesta>All future Paradoxes are fully evolved PokemonIt’s evolution. The Paradox Pokemon eventually evolved into the Pokemon lines they become in the present era.
This happens right around when humans start appearing. Humans preferred the cuter Scream Tails, Flutter Manes, and Sandy Shocks over the stronger ones, and those lines eventually became cuter for human capatability. Slither Wing eventually became Larvesta so that it could evolve into Volcarona.