Each time you boot your game, an initial seed (also called seed) is created. This seed is used to RNG abuse wild encounters, events, in-game gifts, etc.At the "Continue" screen of the game, before your character picture loads, you can see a clock. By checking the clock needle's position, we can find the initial seed. You need to check between 8 and 10 clocks without restarting the game. You can leave the "Continue" screen by pressing B.
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Step 1: Setup 3DSRNGTool
Open the 3DSRNGTool you downloaded.
Select your game version in the top right ("Sun", "Moon", "Ultra Sun", or "Ultra Moon").
Go to "Tools" > "Gen 7 Main RNG Tool".
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Ensure the InputBox has End Position selected with the number 4.
Also select the Find Initial Seed via clock hands option.
Step 2: Recording the clock needles
Boot your 3DS and open the game. Leave it on the "Press Start" screen.
You can let the animations play; they do not affect the seed or frames.
Start recording your 3DS with your camera.
Press A or Start to go to the "Continue" screen.
Record the entire clock movement: from when you enter the "Continue" screen until your character picture displays.
Press B to return to the "Press Start" screen.
Alternate between the "Press Start" and "Continue" screens until you have 10 clock movements.
Step 3: Finding the seed
After recording 10 clock movements, list them in the tool to find the initial seed.
In the InputBox, select the clock that matches the final position of each clock.
This End Position occurs just before the picture loads.
The End Position in the gif shown at the beginning is the last option in the Gen7 Main RNG Tool.
You should see a number appear in the Needle List (12 for the gif demo).
The tool tries to find your seed after you input 8 needle positions.
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You may get various results with only 8 needles; this is why we checked 10 clocks. Add the remaining 2 until you see a single seed.
The last 2 needle positions confirm your seed.
If you don't get any results, check your video again to find mistakes in the needle positions.
If you still can't find results, restart the game and record 10 new clocks.
Your seed should appear in the Results field if you did everything correctly.