Get a Leaf Stone and you'll evolve it.
They are: Weepinbell and then victoreebell
You have to get a Bellsprout or Weepinbell. If you have a Bellsprout, evolve it. Then, once you have a Weepinbell, use a leaf stone on it.
weepinbell evolves by either the leaf stone, or the sun stone.
Level 18.
Level 30.
Level 30.
level 28
Level 25
Level 37.
Level 26
at level 40 it should evolve into drapion
Spiritomb doesn't evolve.