Using a Sun Stone.
Use a Sun Stone on Gloom to evolve it into Bellossom
Gloom doesn't evolve into Bellossom by leveling up. Use a Leaf Stone and TADA! A Bellossom! : )
There are two ways to evolve a Gloom, you can either evolve it into Vileplume or you can evolve it into Bellossom. To get Vileplume all you need to do is use a leaf stone on it. Likewise to get Bellossom you have to use a stone on Gloom, but this time it is a Sun Stone.
Raise an oddish to evolve to gloom, or catch a gloom in the safari zone, then evolve it with a sun stone. You should get bellossom.
You can evolve gloom to bellossom usig the sun stone.
Sunkern -> Sunflora Gloom -> Bellossom
Bellossom is currently not able to evolve by any evolution method. However to get Bellossom you need to use a Sun Stone on a Gloom to evolve it into Bellossom.
Oddish evolves into Gloom at level 21 which then evolves into Bellossom by Sun Stone. Bellossom does not evolve into anything else.
you use a shiny stone.
As of Pokémon Pearl, there are only two Pokémon that can evolve with the Sun Stone item, the first Pokémon that can evolve with it is Gloom and it will evolve into Bellossom and the second Pokémon that it will evolve is Sunkern and it will evolve it into Sunflora.
gloom,so now you have a bellossom
Gloom and Sunkern into Bellossom and Sunflora.