Dex1: The poison sacs under its gills absorb and store toxicity in water supplies. It must keep them full to use poison attacks.

Dex2: Its forked tail allows for fast travel and dispatch of foes. It also acts as a dowsing appendage to find polluted environments.

Dex3: Venpure can purify an entire lake within one year. Because of their tendency to flock, a swarm has been said to be able to purify a lake overnight.