y'know.. we make a lotta fan designs where a Pokémon's biology has been influenced by what species its parents are.. but that's kinda already been a thing?
Piloswine evolves into Mamoswine when it knows Ancient Power, but can't know that move naturally unless Swinub hatched from an Egg bred by Dunsparce, Dudunsparce, or Kecleon, who can learn it naturally
interestingly tho, Swinub and Piloswine CAN learn Ancient Power naturally in Legends Arceus, and while this is most likely explained out-of-universe as breeding not being in the game, it could also be that Mamoswine is technically a "lost" ancient evolution like Wyrdeer
