I am not sure if they is a guide but how do I RNG the legendary birds/Cresselia/Mesprit roamers in DPPt? I have never RNG'd them before so I would like to know the steps. Thanks if someone can help me :)
It's not that different than the stationary really. Here are the most important stuff to keep in mind:
1. They are generated under method 1 not J.
2.Their IVs/Nature/Shininess is generated when you talk to them on their respective island.
3.They can't be synchronized.
4.???
5.I think that's it.
Just save in front of them, hit your delay and advance the frame. Stop 5 frames prior your target frame and release them. Find them in the wild and capture them, I would recommend not saving until you capture and know for sure it's the one you like because you can't just beat the Elite 4 to battle them again. :)