You have to use a Sun Stone on Gloom.
Bellosom- the evolved form of Gloom through the use of a Sun stone
You get the pokemon bellosom from using a sun stone on gloom
You cannot catch a Bellosom on this game. However, if you can catch or get a Gloom and use a Sun Stone on it, Gloom will evolve into Bellosom.
it doesn't evolve by itself, you need a leaf stone or a sun stone... the leaf stone will get you a vileplume, and the sun stone will give you a bellosom.
u get bellosom by getting a bloom and evolving it into bellosom with sun stone you find of 6 island
Use a Sun Stone on a Gloom
Gloom --> Bellosom Sunkern --> Sunflora
In the game Pokémon Diamond you can randomly find the Bellosom when there is heavy rainfall. When it is raining it gathers to dance and play.
sunkern - sunflora gloom - bellosom
sunkern or gloom sunkern into sunflora and gloom into bellosom
Sunkern-Sunflora, Gloom-Bellosom
give a lady in pacifidlog town a bellosom