A guy named Guilz contacted me on Facebook to share a glitch with Destiny Bond in HG/SS. Apparently, if you use the move, then keep using items, Destiny Bond stays active as long as you use items. That means if someone beat your Pokémon after 3 turns in which you used items, Destiny Bond will affect the opponent.
I wasn't able to test this on HG/SS but Haxel
did it on OR/AS and it didn't work. Is this known to someone? Was it a normal feature in 4G?