I need a Breloom (or Shroomish) in Black 2. Please include routes/cities.
You can find Breloom in the Pinwheel Forest Hidden Grotto. There is no way to get Shroomish without breeding, hacking, or trading.
Source: Serebii, IGN Wikis
Shroomish/Breloom can be found in some Hidden Grottos
I found a tutorial on Youtube
You can find Breloom in a Hidden Grotto.If you want a Shroomish you can breed it.