Sun Stonein Pokémon Polished Crystal

Evolves certain kinds of Pokémon. Works on Gloom (into Bellossom), Sunkern and then also Eevee gets this as an addition to get Espeon as well. Considering both Gloom and Eevee have different chains to follow, its an interesting thought to follow. Bug-Catching Contest can give these as prizes. Personally I like Vileplume over Bellossom but both are useful!