Just wondering is there some kind of special technique to doing it or do you just kinda run against the top of the wall and pray?

The 'setup' (if you want to call it that) is to run against the top right corner of the wall, where Pac-Man will walk up and down diagonally. You'll notice he kind of jerks out of that plane hes in and when that happens, mash right to get into the wall; This part is kind of RNG. As you're tapping right you'll notice the camera jerk very slightly once you're somewhat into the wall. Once you see that, tap right, down, then up (really quick taps because if you hold on the direction too long you'll clip out.). After you do that, just hold right and eventually see Pac-Man's face peek out the wall. Hold right until he's out.

This is generally the setup/method to get it but for the most part nobody really has a 100% guaranteed way to get this skip every time. I recommend watching WR to get a feel for the "jerks".

Hope this helps.

The most consistent setup I've found involves holding up + right near the upper portion of the wall. This should eventually clip you into the wall, and once you are inside the wall, tap down + right together until you can just barely see Pac-Man's hand sticking out - this should require either one or two presses of down + right. Once you see this, just mash right on the d-pad and more often than not you will clip through. Be sure to mash right until Pac-Man is completely free from the wall, otherwise you can get pushed back through it the wrong way. This is the best I've come up with, and it is relatively consistent - it tends to work in 3 tries or less. If you want to run Any%, I suggest practicing this quite a bit before doing runs so you get the hang of it.