You would be interested in this post: http://www.smogon.com/forums/showpost.php?p=3383858&postcount=684 from the RNG Research thread.
Awesome! Thank you very much ncsbert! :D
Is there a guide that tells me how to use encounter slots?
Well on PPRNG the seed inspector will give you a list of PIDs and list the ESV (Encounter Slot Value) you just match up what number is listed to what number the guides says it'll be. PPRNG is only for Mac though, so if you're on a PC you's have to see if there is something similar on the RNG Reporter for 5th gen.