SHROOMISH live in damp soil in the dark depths of forests. They are often found keeping still under fallen leaves.This POKéMON feeds on compost that is made up of fallen, rotted leaves.
Whenever a move makes contact with this Pokémon, the move's user has a 30% chance of being paralyzed, poisoned, or put to sleep, chosen at random. Nothing is done to compensate if the move's user is immune to one of these ailments; there is simply a lower chance that the move's user will be affected.