

As shown in the anime, Hatterene plays with people's minds and creates illusions, deceiving them for its own pleasure.

It has also been observed that it dislikes loud noises, tearing apart perpetrators with the claws on its tentacle as a result.

Hatterene has a solitary and reclusive nature, emitting psychic powers strong enough to cause headaches as a method to deter others from approaching and disturbing it. Extending from the pointed end of the hat is a single tentacle that ends in a pink bulb and a consecutive baby-blue bulb that has a trio of sharp claws, which can articulate in a manner similar to fingers, jutting out of it. The hair above Hatterene's head is shaped like a wide-brimmed witch's hat with a conical shape serving as the crown of the hat formation. This hair is colored in a gradient of baby-blue, pale pink, and white from its upper portions downwards. It has extremely long, layered, symmetrical hair, far longer than its body is tall much like a cloak, the hair on its head drapes to the ground and swathes around it to conceal much of its true body, which is adorned by a pink semi-translucent dress that gives it a much taller silhouette, resembling that of a stereotypical sorceress or witch. Its head is round and has a small mouth, narrow black eyes with white pupils, and two elliptical pink markings over each of its eyes resembling eyelashes or eyebrows. Hatterene is a small humanoid Pokémon with a thin, white body. It evolves from Hattrem starting at level 42. Hatterene ( Japanese: ブリムオン Brimuon) is a dual-type Psychic/ Fairy Pokémon introduced in Generation VIII. Pokémon Brilliant Diamond and Shining Pearl.
