Simple question, I've been looking at some replies to this thread, and in terms of difficulty, is it Emerald (Easiest to RNG)>BW>DpPtHgSS>FRLG (Hardest to RNG)? I've been starting with Emerald RNG because I thought it was the easiest.
Emerald is easy in the sense that there's only one aspect to worry about, and that's timing the frame. Whereas in 4th gen, you have to use a timer to hit your seed (which is a bit more complicated than using a timer for Emerald), and then worry about advancing your frame (monster frame, random NPC advancements, etc).
Emerald can be a bit harder though, since the game is running at about 60 fps, whereas 4th gen is pseudo-30 fps, since you're restricted to only even or odd delays. If you've read up a bit, you'll know what I mean by "delays".
BW, I'm assuming is the easiest. I haven't done it, but by what everyone else is saying, it must be the easiest.
FRLG is the second hardest since the initial seed is running at blinding speed (65,536 seeds in only 3 miliseconds), and almost impossible to consistently abuse.
And finally, Ruby and Sapphire abuse is the most difficult, since you only get one shot at hitting the correct frame on your desired seed. If you miss, you have to wait around for the seed to pop up again, and that can take a while. Or, if you have a dead battery, it works just like Emerald, but with a different seed.