Nope, just sit in front of them when they want a rematch, save, then reset if they don't give you the Destiny Knot. All items the trainers give are rarely given, I believe, so this is probably the 'quickest' way to get any of them.I'm having some trouble finding the Destiny Knot. I have battled the trainers Lois&Hal several times now and I haven't got the destiny knot yet. I have completed the Delta episode. Is there anything else I need to do first?
Something I'm curious of is if I change the time on my 3DS clock, will that lock me out of any time/day specific legendaries like Terrakion or Uxie?