Pastoria's great marsh.
A Pokemon guide that you can find in the forest.
To get Breloom in Pokemon Diamond you need to evolve a Shroomish. Shroomish can be found in the Great Marsh after you obtain the National Pokedex.
not sure... shroomish evolves at lv.23
Shroomish is a rare Pokemon in Ruby and Saphire but you can find it in the Petalburg woods.
shroomish!!!!!!!! you have to migrate to get on diamond, pearl and platinum
the safari game rrod54 the true Pokemon master
The Great Marsh. Check every day.
Shroomish is not available to be caught in the wild in Pokemon FireRed, it must be traded from Ruby or Sapphire.
Yes, you can find Shroomish in Pokemon Ruby. They would be somewhere in Littleroot I think... If you find one, just look at pokédex where you can find them.
It would be in a swarm. It would be on random days though. Shroomish is in Route 11 during a swarm, but unfortunately, Shroomish is only in Pokemon Black.
the great marsh
Shroomish is a Grass type pokemon.