Umbreon, a dark type Pokemon.
Umbreon evolves when it completely trusts and loves its trainer. However, it only becomes Umbreon at night. Espeon, its counterpart, evolves under the same conditions during daylight hours.
Hokay, this is a resubmission, now with correct info and a better avatar to match. : D So now I hope everyone is happy. ♥ And to the few people who've told me that Umbreon has been done before in the old arenas, I've *never* seen it. Never. So my apologies. . w.;