Darkrai

I like Darkrai!

In the Movie
Darkrai is indeed terrifying to most living things, it is also portrayed as a protagonist, saving the life of Alice, whose grandmother named Alicia had helped it, then intervening in the cosmic conflict between Dialga and Palkia.

In the Video Games
Naturally learned moves:
 * Lvl 1: Night Shade
 * Lvl 1: Disable
 * Lvl 11: Quick Attack
 * Lvl 20: Hypnosis
 * Lvl 29: Pursuit
 * Lvl 38: Nightmare
 * Lvl 47: Double Team
 * Lvl 57: Haze
 * Lvl 66: Dark Void(Darkrai's exclusive move)
 * Lvl 75: Embargo
 * Lvl 84: Dream Eater
 * Lvl 93: Dark Pulse

Darkrai is exclusive to Pokemon Diamond and Pearl. To obtain it, people had to get a Mystery Gift at Toys R Us. It is also obtainable by using the Action Replay DS. If the player has activated the "Walk through anything" cheat, walk across the ocean from Fullmoon Island to the east. Eventually you'll arrive on Newmoon Island.

In the Pokemon TCG

 * There is a box set available that includes a deck, booster pack, a Darkrai card, and an oversized version of the Darkrai card.