Where do you obtain the bicycle on Pokemon White?

You can obtain the Bicycle in Pokemon White in Undella Bay, after you've defeated Clay, the Gym Leader of Striaton City.

Here's how to get it:

1. Beat Clay: This will advance the story and unlock the next part of the game.

2. Go to Undella Bay: The town is located directly south of Striaton City.

3. Talk to the woman standing near the Pokémon Center: She'll give you the Bicycle for free!

Enjoy your new mode of transportation and explore the region with ease!