Okay thanks, and yea I will trial and error hehe =)
But for some reason I just thought that, when I set frame skip at 0 after doing the amount of frame advances I would always capture Kyogre at the right frame because Frame skip is set to 0, so it wouldn't be advancing anymore frames.
I had a question about RNG abusing the legends in Emerald.
Let's say I'm 40 frames before the frame I want to catch Kyogre on.
Should I just pause my game, load the save state and set Frame Skip at 0 and advance the amount (40) of frames to reach the desired frame?
Nexus said that the frame will advance because Kyogre has to get to you before the frame is determined. (The ''steps'' Kyogre makes to get from the lake to the lakeside)