OH, I meant to ask - did you use a pattern for that one?
MINI-TUTE: A PLEATED POCKET by BertaBerta
(Featured on her yellow paisley purse)
"I made a template of the desired pocket shape, then I cut it in half and added a seam allowance. Cut two of those from the main fabric. Cut a rectangle the same height as the pocket from the pleat fabric. Sewed the three parts together to make a looong pocket shape. Folded at each seam and pressed it in hardcore, then matched the two folds up and flattened out the pleat panel and pressed again. Now there's a proper pocket shape with a hidden pleat in it.
Topstitched the fold on each side of the pleat to keep it neat, then played with the pucker a bit - this is the hard part to describe... If you hold both ends of one side of the pleat and curve them in towards the center a bit, they'll open the pleat up into an oval that kind of sticks out. Do that to both sides of the pleat until you like how it looks, the topstich the top and bottom of the pleat to hold the pleat in that position.
Cut another piece of the main fabric, lay it over the front of your nice pleated panel, and sew around your seam allowance on the whole curved side, leaving the top open. Turn the piece right side out and press again. Now it's a nice pocket panel with a puckered pleat on one side and a smooth back and finished edges except for the messy top. Use a rectangle of contrast fabric with all the unfinished edges turned under and pressed, then folded in half and pressed to bind the top of the pocket. Topstitch the whole shebang onto your bag and there ya go."