4. While the second timer is advancing, proceed to the main continue menu and wait there. The second timer also has a beeping countdown, from 10 to 0. Your goal is to hit A on the continue screen at the moment the last beep sounds. Again, play it through first to see what I mean.
That's the main idea behind it, you will probably need some practice soft resetting and continuing at the proper time, but once you master it, the timer will let you hit virtually any delay. When you first start trying, make sure your 'error' window is large (+/- 1 or 2 seconds, +/- 50 or more delay).
If you do a few trials and you are consistently wrong, you can input the wrong delay you are hitting into the 'other delay' box and hit update. This will do a self correction to the second timer to help you get closer.
If you have any other questions feel free to ask. And thanks for the offer, but I already RNG abused the Entei you are working on now :p