"Just discovered an interesting glitch while replaying Crystal"

In HGSS, if the player leaves the Dragon's Den using an Escape Rope before Clair gives them TM59 Dragon Pulse, she will give it to them in the gym instead. It is not possible to use an Escape Rope to exit the Dragon's Den in Crystal due to Clair approaching the player as soon as they exit the shrine, but it is possible to white out inside the shrine if all the player's Pokemon faint due to poison damage. I ended up doing this as I only had one Pokemon in my party.Upon respawning outside the last Pokemon Centre used, I returned to the Blackthorn Gym where Clair tells the player "You kept me waiting!" and gives them TM24 Dragonbreath.However, when I went into the Dragon's Den immediately after this to collect the gift Dratini, upon reaching the door of the shrine, Clair approaches the player and gives them TM24 again. So, by doing this, I wound up getting two copies.Wish it could have been a slightly better move, but hey, two for the price of one ain't bad. via /r/pokemon http://ift.tt/2hapVHY