Originally Posted by Fat Sixfortyfive
I just finished RNG-ing Giratina at the Sinjoh Ruins (Naive 30/30/31/30/27/30 w/ Hidden Power Fire - seed F1060C88). Thought I'd share how I did it in case anyone wanted tips for the dragon trio:
- Saved my game one step in front of the Ruins of Alph head office with only Arceus in my party.
- Reset the game and took note of the seed I landed on by using Seed Verifier. I called Elm 10 times to confirm the seed, leaving me at frame 10 for this seed.
- I advanced one step forward to trigger the cutscene that takes you to the ruins. Once at the ruins, I took the shortest path to Cynthia, then took the shortest path back to the chamber and the tile on the stage that begins the event.
- After receiving Giratina, I checked its stats and deduced that this Giratina was produced on frame 19, meaning that between calling Elm and receiving Giratina, my frame advanced 8 times. (This will possibly be different for you.)
- I quit and restarted, attempting to hit the proper seed and frame for the spread that I wanted. This time, after confirming my seed by calling Elm, I advanced the frame 139 more times with a combination of the radio and additional calls to Elm. This puts me at frame 149. I repeated my earlier steps by taking the shortest path to Giratina (advancing the frame 8 times) and receiving it (advancing it one final time, to frame 158, which contained the spread I wanted).
You can probably save and begin the process one step outside of the Sinjoh Ruins main chamber, after Cynthia is already inside. I only did it this way because I was nervous about initiating any of this before saving.