How do you catch a shuckle on pokemon white?

You can't catch Shuckle in Pokemon White. Shuckle is exclusive to Pokemon Black.

Here's why:

* Version Exclusives: Many Pokemon games have version-exclusive Pokemon. This means that certain Pokemon can only be found in one version of the game, not both.

* Shuckle's Location: In Pokemon Black, Shuckle can be found in the Pinwheel Forest on Route 17.

If you want to catch Shuckle, you'll need to trade with someone who has Pokemon Black.