Thickly covered with a filthy, vile sludge. It is so toxic, even its footprints contain poison.
Smells so awful, it can cause fainting. Through degeneration, it lost its sense of smell.
They love to gath er in smelly areas where sludge ac cumulates, making the stench around them worse.
Its body is made of a powerful poi son. Touching it accidentally will cause a fever that requires bed rest.
As it moves, a very strong poison leaks from it, making the ground there barren for three years.
— Pokédex entries (via PokeAPI)