In Mystical Pique on the level Golly G. Golem when you eneter the first 'secret' area to free a cage of Electoons you must crush attack through four enemies to get to the cage. This area is pretty much set up to gift you this achievement.
The first 'secret' area is just after you go through the first door in to the second area. You must wallrun and jump onto a vine. The door is on the ledge on the right.