Gloom evolves 2 ways

Stages

Oddish starts a line of three stages, from Generation I

1. Oddish#0043grasspoison
2. Oddish to GloomLevel 21
   Gloom#0044grasspoison
3. Gloom to VileplumeUse Leaf Stone

   Gloom to BellossomUse Sun Stone
   Vileplume#0045grasspoisonBellossom#0182grass

How each step works

3 steps in the Oddish line, the same in every game that has them

Items in this chain

2 items take part

Leaf Stone, Sun Stone