As a strange undersea being, Bruxceus detests intruders in its domain. It uses pulsing psychic energy from its cranium to repel them. The deep-sea caverns it claims for itself are usually decorated garishly with bright bits of coral and undersea plants.
It is described in mythology as the Pokémon that shaped the universe with its 1,000 arms. When it unleashes its psychic power from the protuberance on its head, the grating sound of grinding teeth echoes through the area.