Celesteon

An eevee thought to be born from the sky itself, star-studded fur twinkling. Its body shifts forms with the changing horizon: inky umbreon at night, face enshrined in moon phases; brilliant espeon by day with rainbow fur, and a gleaming sun halo at its back; and finally taking on its true form in the times between, a gleaming eevee with a flowing, cloud-like pelt the color of sunsets and gold. Whispers tell of yet another form, obscure and unknown, only seen under the ominous eye of an eclipse.