Where to find girahim on Pokemon Black and White?

Girahim is a character from the Legend of Zelda series, specifically Skyward Sword. He is not a character or a Pokémon in Pokémon Black and White.

If you are looking for a Pokémon with similar features to Girahim, you might want to consider Hydreigon. It's a powerful Dragon/Dark-type Pokémon that has a similar dark and menacing appearance.