Zekrom

Zekrom is a Generation V Legendary Pokémon and the mascot for Pokémon White. It was first revealed on the official Pokémon website on May 28, 2010 along with Reshiram. It will most likely not have a gender. It is one of the two main Legendary Pokémon, and will appear on the box art of Pokemon White. It is officially confirmed to have the Dragon type, and its second type is Electric. Also, Zekrom's name comes from the Japanese word "kuramu" which means to grow dark. This is a clue that the two Legendary Pokemon, Reshiram and Zekrom, may have something to do with the sky. It is also rumoured that, like with Pokémon Ruby and Sapphire, there is a catastrophic event going on at one point, where Zekrom plunges the sky into total darkness. So far, the only known ability of Zekrom's is TeraVoltage.It represents yin which represents night or chaos.

Trivia

 * Zekrom appears to be more popular than Reshiram but most of people's views on Black and White include Zoroark.
 * That Zekrom is the first Pokemon ever to consist of the types dragon and electric.
 * That both Zekrom and Rshiram's tails are round and fat, with a small point at the end.
 * Zekrom is the black yin Pokemon, which symbolizes night, chaos, and darkness. Reshiram is the white yang pokemon, which symbolizes day, peace, and Light.