Ultra Sun and Ultra Moon Timeline Leap RNG

This guide uses Frame 1 and Frame 2 to refer to two key points in the RNG timeline:

Frame 1: The frame where you'll press A to initiate an action (e.g., advance dialogue) and jump to your desired timeline.
Frame 2: The target frame in your desired timeline, which determines the Pokémon you receive.

The goal is to use Timeline Leap to land on Frame 1 at the right moment, which will then jump you to the timeline of Frame 2 (your Pokémon's timeline). Possible ways to leap:

Dialogue: The game makes 1 RNG call while loading the next line of text.
Closing the X menu: The game makes 2 RNG calls for the next character fidgets.
Press A on the Yes/No screen (Mystery Gifts): The game makes about 10 RNG calls to generate the Pokémon.

Note: Timeline leap is not available for wild Pokemon since there is not a way to jump between timelines when using Honey.

Tools

Step 1: Select your target frame

Go to "Filters" and search for your desired Pokemon. Leave "Safe F Only" unchecked.
Search using "Frame Range" to find a frame you want to land on.
Right-click on it to "Set as Target Frame". This frame will be referred to as "Frame 2" from here on.

Step 2: Advance frames

Use Festival Plaza or Hau'Oli shopping mall to advance frames quickly.

Step 3: Position your character

As you near Frame 2, exit Festival Plaza or fly to where you will battle or receive the Pokemon.

If it's Xurkitree, stand behind it for a wider window of 1 NPC.
If it's a Mystery Gift, go to the first PokeCenter, and stand behind the delivery man looking at the red counter. Ensure there are 4 NPCs. If there are 5 NPCs, leave and re-enter the PokeCenter.

Step 4: Reach the leap screen

Navigate to the final A press screen that will trigger the battle or reception of your Pokemon.

For Mystery Gifts, engage the delivery man to the Yes/No dialogue.
If it's Xurkitree, open the menu when the NPC counter in PokeReader switches from 2 to 1. This will pause NPCs.
For in-game gifts and stationaries, the final dialogue will advance 1 frame.

Step 5: Stop at any safe frame

Use 3DSRNGTool to find safe frames with the "Safe F Only" filter. Reset filters before looking up a safe frame.

Step 6: Find the timeline leap frame

Once you confirm your frame is safe, input it as the starting frame in the "Frame Range."
Choose "Timeline Leap" and click "Calculate."
A window will pop up with the frame to press A on. This is Frame 1.
- For Mystery Gifts, this is when you press A on "Yes" to accept the Pokémon.
- For the menu method, this is the frame to close the menu.
- For other Pokémon, it’s the 3rd or 4th press of A before the final screen.

Step 7: Verify the target frame

Because 3DSRNGTool’s "Frame Range" mode may not always match perfectly, check that Frame 2 still has the spread you want before continuing.

In the pop-up window, choosing "Yes" will confirm if Frame 2 still has the spread you want.
- Choosing "No" lets you check for other Frame 1 options that might land you on the right spread in Frame 2.
If Frame 2 doesn’t have the spread you want, search for your target spread in the timeline (click "Yes" when the window appears).
- Right-click and select "Set as Target Frame" on the desired spread. This becomes your new Frame 2.
If Frame 2 isn't in the timeline, find the new frame with the spread by selecting "Frame Range." Then, redo the "Timeline Leap" to find the new Frame 1.

Step 8: Profit

Advance to Frame 1 and press A to move the dialogue to the final screen.
- For the menu method, hold X and press A to unpause and close the menu, then immediately press Start + Select to pause the game again.
Be ready to press A on Frame 2, as there's a small 1-10 second interval between frames.
Press A or take a step forward on Frame 2 to receive your Pokémon. Congratulations!