Oddish evolves at level 21 + it evolves into vileplume once you give it a Leaf stone.
oddish
Oddish evolves into Gloom in Pokémon Ruby.
Oddish evolves at level 21 in HeartGold.
No oddish evolves into Gloom or Bloom whatever that drooly Pokemon is.
Oddish evolves into Gloom at level 21.
Oddish evolves into Gloom at level 21. After that, you can evolve it into Bellossom by using a sun stone or Vilepume by a leafstone.
get it to l.21
level 31
21
Oddish will evolve at Level 21.
Oddish evolves into Gloom at level 21. After that, you can evolve it into Bellossom by using a sun stone or Vilepume by a leafstone.According to Bulbapedia level 21
you use a leaf stone on GLOOM, the evolved form of oddish.