As part of its ongoing efforts to promote every single Pokémon out there, The Pokémon Company has shared special content dedicated to Venonat and Marill:
Did you know? Venonat is said to have evolved with a coat of thin, stiff hair that covers its entire body for protection. It possesses large eyes that never fail to spot even minuscule prey.
Marill’s oil-filled tail acts much like a life preserver. If you see just its tail bobbing on the water’s surface, it’s a sure indication that this Pokémon is diving beneath the water to feed on aquatic plants. When fishing for food at the edge of a fast-running stream, Marill wraps its tail around the trunk of a tree. This Pokémon’s tail is flexible and configured to stretch.
Source: @Pokemon