Leaf stones can be found in Viridian Forest, given by Bill's grandfather, Picknicker Gina, as first prize in the Bug-Catching Contest or in the Pokeathlon Dome on Tuesdays, Thursdays or Saturdays.
evolve pokemon
you can't catch it. evolve it from the Pokemon after oddish with a leaf Stone
if you have a leaf stone weepinbell will evolve
gloom
Take a leaf stone and use it on him.
On Monday you can get a leaf stone, Tuesday you can get a fire stone, Wednesday you can get a water stone
In SoulSilver he gives you a Leaf Stone if you show him an Oddish :) Hope that helped-- Taylor
weepinbell, exeggcute, gloom, nuzleaf, and I think that's it :)
Oddish-Lvl 21-Gloom-Leaf Stone-Vileplume Exeggcute-Leaf Stone-Exeggutor Bellsprout-Lvl 24-Weepinbell-Leaf Stone-Victreebell Seedot-Lvl 14-Nuzleaf-Leaf Stone-Shiftry
You have to use a leaf stone on your eevee. Sorry, I don't know where to find a leaf stone though. : ) hope this helped!
I'm pretty sure you need to find a Leaf Stone.
It evolves at level 21 and then Weepinbell evolves into Victreebell if you use a Leaf Stone on it.