Balzack possesses several qualities of a typical villain: arrogant, dishonest, immoral, and murderous. These traits are shown by his ruthless betrayal and murder of Mahabala. It becomes evident throughout the game that Balzack is loyal to no one but himself. After supposedly achieving the pinnacle of the Secret of Evolution, Balzack indicates that he plans on usurping Psaro, just as he did to his previous master. Even his fellow demons dislike him. Marquis de Léon took the chance to separate himself from Balzack when the opportunity presented itself. Balzack's minions expressed no sadness upon his death. Even Psaro, who normally does not display cruelness towards his allies and underlings, does so for Balzack. He impresses punishment of death upon him for failures (according to Marquis de Léon's dialogue after his initial defeat), something he normally does not do, and uses him as a test subject for an experiment expected to fail.
While he appears to be a pallet-swap of the night clubbers and Pruslas in his "Baalzack" form, select games in the Monsters series show that he is larger than the former while smaller than the latter, taking up two spaces.
"'Uman imbéciles! Zis is my castle now. ...Oh? I 'ave a sense of déjà vu. Ze daughter of Mahabala, non? What a plaisir to see you again! You do not recognise me, per'aps? It is I, Balzack. But I am stronger zan before. Now zey call me Baalzack! Regard ze result of my évolution extraordinaire! Zis is ze closest you will ever come to seeing ze form of a god! Zere is only one— Non! In zis form I am stronger even zan Psaro ze Manslayer 'imself! Listen well, ma fille. I know 'ow you must miss your father... But soon you will join 'im!"
If Alena, Kiryl and/or Borya are in the party while Meena and Maya are not:
"Uman imbéciles! What business do you 'ave in zis castle? ...Ah, it is you... Ze original in'abitants, non? Ah ha ha! Welcom 'ome! But zis is my castle now. Ze castle of Baalzack! If you desire to 'ave your castle back, you will 'ave to defeat me! Regard ze result of my évolution extraordinaire! Zis is ze closest you will ever come to seeing ze form of a god! Zere is only one— Non! In zis form I am stronger even zan Psaro ze Manslayer 'imself! Bien! You will grovel in ze presence of such might!"
"Uman imbéciles! What business do you 'ave in zis castle? But zis is my castle now. Ze castle of Baalzack! Regard ze result of my évolution extraordinaire! Zis is ze closest you will ever come to seeing ze form of a god! I am more mighty zan 'umans. I am more mighty zan ze monsters! You will grovel in ze presence of such might! Zere is only one— Non! In zis form I am stronger even zan Psaro ze Manslayer 'imself! So attack me at your peril, pathétique worms!"
The entirety of Chapter 4 is centered on the sisters' quest to track down their father's murderer, whom they finally encounter at Palais de Léon. However due to the intervention of the Marquis de Léon, the sisters are defeated, thrown in jail, and ultimately forced to flee to Endor.
Balzack uses powerful magical and breath attacks, and if he is injured he will recover himself fully with Fullheal. Fortunately he is vulnerable to the effects of the Sphere of Silence. He also has a passive healing he gets per round, though not as much as he has later in Chapter 5.
*In the NES version, the Sphere of Silence in addition to disabling Balzack's magic also changes his coloring. The remakes remove the pallet swapping effect.
In the NES version, Balzack's NPC sprite through both encounters is the one used for Psaro's Pawn and Master Kung. In the Sony PlayStation and Nintendo DS versions, he takes the form of a king until the battle begins and then changes to a sprite resembling his battle form.
In Chapter 5, the Secret of Evolution has transformed him into a more powerful being: Baalzack. He has been evicted from Palais de Léon, likely due to his failure back in Chapter 4, and now occupies the empty Castle Zamoksva. He has become astoundingly arrogant, and is disliked even by his subordinate minions. His intention, he says, is to enhance his body to be even more godlike than Psaro the Manslayer, but he lacks the Armlet of Transmutation which allows him to use the full power of the Secret of Evolution. With the help of the Hero 4, Maya and Meena are able to finally defeat him.
A cautionary tale to others, this miserable individual's conscience was clouded by the Secret of Evolution, which he took to its very limits, leaving him a monstrous freak of nature
An avaricious alchemist who stole the Secret of Evolution and transformed himself into a monster. He murdered his master to steal his ultimate invention—little did he know that it was incomplete...
Both of Balzack's forms appear as part of the limited True Dragon Quest IV event, where they can be recruited during the event's story. Balzack is an A-rank monster of the Beast family and he will join the player in Chapter 3, Episode 4: Fateful Faceoff of the event quests and he can be fully awakened by clearing the quest on any difficulty. Balzack can also participate in his Baalzack form's Battle Road as a party member.
Baalzack is an S-rank monster of the Beast family and he will join the player in Chapter 4, Episode 4: One More Mortal Foe of the event quests and he can be fully awakened by clearing the Baalzack stages in Battle Baalzack on any difficulty. He can also be synthesized in the Japan-only Dragon Quest Monsters: The Dark Prince event at the Alter of Amalgamation by combining a Night clubber Might and two Rashaverak Mights together. Baalzack also stars in his own Battle Road.
The name "Baalzack" is derived from Baal, the Levant honorific title equivalent to the English "lord". The title has been misappropriated into "Bael" and "Beelzebub" over the centuries, two of the most infamous demons in the Lesser Key of Solomon. This works as a double pun, befitting Balzack's arrogance upon obtaining his transformed state and his demonic actions through out the game's story.