Balrog is an evil spirit was once sealed in the Underground Temple in Sleepywood by Tristan, a legendary hero who died in place of Manji. Balrog had been resurrected from the darkness, the reason behind its resurrection is not known. Upon Balrog's death, it mentions that one day his full power will be back, and rule Maple World again.
Balrog often summons Baby Balrogs which can be an annoyance. Eventually, Balrog will try to heal itself, noticeable when Balrog is darkened, in which pillars must be hit to stop the healing process, otherwise, Balrog will heal a massive amount of HP. There is also a time limit, if the player runs out of time, they will be booted from the battle.