Lombre's entire body is covered by a slippery, slimy film. It feels horribly unpleasant to be touched by this Pokémon's hands. Lombre is often mistaken for a human child.

Lombre is nocturnal—it will get active after dusk. It is also a mischief maker. When this Pokémon spots anglers, it tugs on their fishing lines from beneath the surface and enjoys their consternation.