Gamer's Log, Game Date 3.31.2016 - Sleepy Grobblers are lazy and I fought them in Pocket MapleStory SEA. (Play Pocket MapleStory SEA Free → http://mcaf.ee/zs9vyb)
After completing the quest, I took my character back to Cartalion and reported the completion of the quest where I was rewarded with 120 exp and 248 Mesos.