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.
Shroomish is a Grass type pokemon.
Shroomish > lvl 23 > Breloom
Shroomish is a rare Pokemon in Ruby and Saphire but you can find it in the Petalburg woods.
Shroomish is not available to be caught in the wild in Pokemon FireRed, it must be traded from Ruby or Sapphire.
You can't. It's exclusive to pokemon black (or you can poketransfer or trade) In pokemon black, it's a swarm pokemon on route 11. You'll see swarm notifications on bulletin boards in gates
Shroomish > lvl 23 > Breloom
Shroomish evolves into Breloom, starting at level 23.
Breloom!
yes you can.
Shroomish
Shroomish is #285 in the national pokedex, and it is a Grass type Pokemon.