Have spent 3 hours trying to research and replicate the Umbreon/Espeon generation. Either I still don't get it, or my arbitrary TID/SID combo doesn't work. Still haven't gotten a straight answer on whether or not PKhex is 'wrong' when it says that unedited Umbreon/Espeon's are flagged as illegal, just explanations about Umbreon being generated 7 frames later than expected...and Espeon being generated 7 frames after Umbreon, and the correct Espeon PID being another 2 frames ahead.  Working w