Lympha Bog smells like death, and it's filled with poison pokemon and sludge. The toxic environment here predates the Pax Institute, which is blameless for the bog's miasma (in fact, the scientists tried cleaning the place up before giving up forever). If you're willing to brave the noxious air and trudging through the bog, Lympha Bog is the shortest path from Meditrina to Decima Town.