Morelull are nocturnal Pokémon that walk around at night on their leg-like roots. They move because staying in one spot and sucking all the nutrients from the soil would cause surrounding plants to wither. Morelull uses its leg-like roots to make contact with its fellows and communicate with them.

Morelull broadcast spores that glow brightly when they burst open. Looking at their pulsing light has a soporific effect. It seems that in times of danger, Morelull broadcast these spores.