Originally Posted by Fat i1338
It's possible to do that with Entei and Raikou, since they respawn after beating the Elite Four. However, it's much, much easier to RNG them now.
Assuming you already know how Elm calls work, Irwin's responses are:
K: I'm so glad you called! ...
E: "Hearing about your escapades rocks my soul" or something like that
P: How are you? ...
Vulgo, you need to save outside of Elm's lab and use the NPCs to advance your frame. Which is why it's really really annoying to try on a cart, especially if you don't have an AR to check IVs (so you can check the delay you hit). I suggest finding a frame of 5 or anything close to that. Iirc there's an HP Electric seed that you can find at frame 5 (when you search you have to make the delay range wider to get lower frames).