Espeon's velvety fur is so sensitive that it can sense minuscule shifts in the air, allowing it to predict the weather and its enemies' thoughts and movements. By doing so, the tip of its tail quivers. The gem on Espeon's forehead glows when it unleashes psychic energy from the gem and darkens when all of the built-up energy has been exhausted. Espeon builds up its psychic power by bathing in the sunlight. As such, it does not handle battles at night well.