Goin' for a doomsday theme; and no, it's not that stupid dog, or Absol.
Pokemon of the Week #14 (12/19/2012)
Darkrai, the Pitch-Black Pokémon. It chases people and Pokémon from its territory by causing them to experience deep, nightmarish slumbers. Folklore has it that on moonless nights, this Pokémon will make people see horrific nightmares.
Back in the day, I didn't really know anything about competitive Pokemon. I started playing Pokemon Battle Revolution online, which helped me become a lot better. I had a lot of experiences on PBR, such as being introduced to my to be fav, getting practice in doubles, and...Darkrai. F-cking Darkrai. Darkrai is a fast son of a bitch who has a move that puts both of your Pokemon to sleep at once, and it usually hits, too. Not just that, but it hits hard, and hurts your sleeping Pokemon due to Bad Dreams, its ability. Screw you, Darkrai. Screw you and your stupid signature move and ability, and screw your stupid design. Worst Dark type ever.
...ahem. Competitively, Darkrai has always been Uber due to its great speed, Sp. Attack, and access to Bad Dreams and Dark Void. I'm no Ubers expert, so I can't go into a detailed analysis, but Darkrai seems to be no joke at all. Sure, Dark typing can be a problem defensively, but keep in mind that it makes Darkrai immune to Wobbuffet's Mirror Coat. It's one of the few special attackers capable of doing this. Even though they share the same BST, Darkrai has been quite a bit more successful then its lunar counterpart Cresselia.
I chose Darkrai to represent 2012's "end of the world", because it's a dark type, is often associated with bad things (like Absol), is often considered evil (PMD2 anyone?), and multiple other reasons. It's also a very notable Pokemon, which fits well with a very notable event (or lack of event...)