In Berry Forest on island 3
Gloom and Sunkern.
catch an oddish and train it until it evolves into a gloom
yes. in berry forest
You have to get an Oddish first, then evolve it into Gloom. After that you give Gloom a Leaf Stone and he will evolve into Vileplume.
In Pokemon Leaf Green, Exeggcute (into Exeggutor) Gloom (into Vileplume), Weepinbell (into Victreebel)
sunkern to sunflora (trade from emerald) gloom to bellossom
Four Island is a location in Pokemon LeafGreen. To start the journey there, you need to have at least 60 different Pokemon.
beat a trainer and search the Pokemon up in your Pokedex
in the Pokemon tower in lavender town
Vulpix evolves into Ninetales. This is the only Pokemon caught in Emerald that can evolve from a firestone. If you have traded an Eevee or a Growlithe to your Emerald game, they can evolve too.
you cant find gloom in leaf green. you would have to trade. :P
Gloom is a Grass-Poison type Pokemon.