Players can evolve their Piloswine into a Mamoswine in Pokémon Brilliant Diamond & Shining Pearl. It's common for the Pokémon series to introduce new evolutions to older Pokémon.
Looking at Eevee alone, this Pokémon has received new evolutions in the second, fourth, and sixth generations of Pokémon games. When the original Pokémon Diamond & Pearl was released on the Nintendo DS in 2006, players could evolve some of their favorite classic Pokémon into new evolutions.
Read more on screenrant.com