The problem here is that i had done darkrai quest last year but i did not have the chance to get iv lock. This year i have to start the quest again in order yo get gengarite stone and the iv lock but accidentally i pressed the yes option when a message after being transported to dark realm said you wanna end the quest in defeat. Therefore i want someone from staff to reset the quest for me.Thanks beforehand!!!

You have to respawn Alucard in his Castle on the third floor, by defeating the Horon boss in the Dark Valley (north of Necropolis).
Make sure to not let any pokemon of you faint while battling Horon. If you didnt get the Rapidash Mount from Horon yet, you will get rewarded with the mount on beating Horon. You have to wait 3 days for Horon to respawn after that. If you beat him again, Alucard will respawn.
Defeat Alucard with a pokemon that has the move Miracle Eye on your party and you will find yourself on Dark Realm again.

Ok thanks a lot!!!