I'm having a hard time copying the inputs by just looking at the video linked in the guide. Is there a detailed written version somewhere?

The mount moon manip?

No the trainer ID. For F1C8

Same problem, I still don't understand if you need to hold buttons depending on frames or the tile you're in, the video doesn't explain much

Ok, so since I couldn't find one after trying a while I wrote one up myself that seems to do the job.

1. Hold UP+B+SELECT when the Copyright Screen appears
2. When you hear the cry sound effect on the main menu, release and hold A+B+START+SELECT
3. Once the game resets hold nothing
4. Hit A when JigglyPuff does his 2nd jump
5. Hold start when the Main Menu appears
6. Hit B as soon as it gets to the New Game screen
7. Right when Squirtle has slid off the screen, hold START (Hitmonlee should slide onto screen just before the Main Menu fades away.)
8. Hit A as soon as New Game appears