Gloom evolves into 2 different pokemon. If you use a leaf stone, it will become Vileplume. If you use a sun stone, it will become Bellossom. Also, level it up after you give it the stone.
Just give a leaf stone to it tomake it evolve into vileplume and a sun stone into bellossom
Gloom evolves into vileplume by leveling up or leaf stone. It also evolves into bellossom by a sun stone
Use a leaf stone on your Gloom. Ta-da! You now have Vileplume!OR use a Sun-Stone on it. Ta-da! BELLOSSOM!!!!
use either a sun stone or shiny stone. I forgot which one it is.