Swampede's body is coated in a mucous that liquefies solid rock on contact. Thanks to this, Swampede spend their lives swimming through the ground, gleefully gobbling up whatever mushrooms they can find.
Highly aggressive, it uses the claws near its neck to dig into its opponents and poison them. If it senses the approach of a storm and a tidal wave, it protects its seaside nest by piling up boulders.