You have to give it a sun stone.
Gloom will evolve into a Bellossom and Sunkern will evolve into a Sunflora.
Gloom --> Bellosom Sunkern --> Sunflora
You have to use the sun stone on sunkern at any level but it is hard to get a sun stone in soul silver.
use them on sunkern or gloom to evolve them into sunflora or bellosom respectively
you can evolve a gloom into a vileplume or a sunkern into a sunflora with a sun stone in PKMN SS versionGloom evolves with a Sun Stone into Bellosom in Pokemon SoulSilver.
gloom can evolve into bellosom and sunkern can evolve into sunfloria.
Do whatever you want.
Sunkern into Sunflora
Sunkern evolves into a sunflora when a sunstone is used on it.
The Sun Stone causes Gloom to evolve into Bellossom. It also causes Sunkern to evolve into Sunflora. You can either win it from first place at the Bug Catching contest, or the Pokeathlon dome.
There aren't any new Pokemon in Platinum that evolve with a Sun stone. But these are the Pokemon that evolve with a sun stone:Sunkern into SunfloraGloom into Bellossomit will evolve gloom into bellossom and sunkern into sunflora. You're welcome!!
Give it a Sunstone and it becomes a Sunflora.