UnopenedClosure Posted April 10, 2021 Share Posted April 10, 2021 Hi all, I'm working on a TAS of LeafGreen (on an emulator), and as part of my route, I need to catch a Pokemon with specific IVs generated by Method H4 at a specific RNG frame (frame 93395, to be exact). However, I am only able to make the encounter generate with IVs generated by Method H2. I know that it is theoretically possible to change the RNG Method for the encounter because I have done it before, but not in any sort of reliable way. I just sort of threw inputs at it until something different happened. That has not been successful thus far. Is there a way that I can get this encounter to happen with the RNG Method that I want? It's been driving me insane Link to comment Share on other sites More sharing options...
Kaphotics Posted April 10, 2021 Share Posted April 10, 2021 You'd need to influence the vblank to occur at a different time while the game code is executing. Emulators don't all behave the same way (timing/efficiency). Different inputs on prior frames may cause extra/less code to be executed, altering the timing in which the vblank interrupt occurs relative to the PIDIV loop code. Think of it as two parallel processes; vblank and game-loop. vblank executes X frames per second, and the game loop gets paused whenever vblank is triggered, and a rand call happens. There is no reliable advice besides input spam on prior frames, to shift when a vblank happens. Nobody has profiled the game loop to show what player inputs can modify the assembly instructions executed per frame, or estimating when a vblank will occur based on the game loop code. 2 Link to comment Share on other sites More sharing options...
UnopenedClosure Posted April 10, 2021 Author Share Posted April 10, 2021 1 hour ago, Kaphotics said: There is no reliable advice besides input spam on prior frames, to shift when a vblank happens. Any idea how many frames beforehand? 1? 5? 500? Link to comment Share on other sites More sharing options...
Kaphotics Posted April 10, 2021 Share Posted April 10, 2021 No idea. Link to comment Share on other sites More sharing options...
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