Gloom can! If you give him/her a sunstone it will evolve into a bellosom. If you give it a leaf stone it will evolve into Vileplume.NOTE: This is for Pokemon '''RUBY'''
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A Sun Stone will evolve Oddish, Sunkern, Cottonee, Petilil and Helioptile.
in order to evolve Roselia you have to use a sun stone on it You use a shiny stone, not a sun stone.
You can evolve Gloom by a sun stone, or a Leaf stone. Sun stone= Belossom Leaf stone= Vileplume
gloom elvolves with sun stone
Gloom will evolve to Bellossom, and Sunkern will evolve into Sunflora using a Sun Stone.