<p>This Crobat is supposed to switch into a wall. Use another Poké to force the wall to use Recover/Roost/Etc, then bring in Cripplebat. Toxic the wall, for starters.</p>

<p>Now, there's two thing you can do. One, if you've got very low health, Brave Bird the enemy into the ground. It will hurt BAD. Two, if you've got sufficient health, pull a Confuse Ray on the possible switch. Again, now you either Brave Bird if the enemy put you at low HP, or U-Turn if not.</p>

<p>At this point you'll probably have low health, so next time you switch Crobat in, use Brave Bird to put a big dent in something.</p>

<p>Adamant is an option over Jolly for extra strength.</p>