I really moved ahead playing the Bubblegum Troll event and am now on 443 (still way behind a lot of the players who have posted in this thread). I have been having lots of fun with the BGT event, but I hope once it is over that Dachs comes back with his key because I think that's the only way for me to try and get him and I still have a ways to go until I can add him to my friends. Am I correct that you only get stickers for him every time you unlock one of the chests? If so - I'll have to put forth a lot better effort to unlock them!