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The hacksaurus (originally BattleRex / Battle Rex) is a recurring monster in the Dragon Quest series. Introduced in Dragon Quest VI, they are depicted as a mix between a theropod dinosaur and a traditional European dragon wielding a broad axe.


Hacksauri are powerful members of the dragon family, introduced in VI as one of the strongest end-game enemy types. Though later titles would have the species trade positions with the Tyrantosaurus monsters, the Hacksaurus is still considered by most players to be a dangerous foe when first encountered. As demonstrated in the Arkbolt cave, the species exhibits r-type reproductive strategy, with the mother only watching over her offspring until their eggs hatch. Also of note, said eggs will hatch into Diethons when examined by the player. Though this is likely due to game difficulty balancing more than anything, it could suggest a metamorphic relationship between the two types of monsters in a similar to the fan-precieved relationship between Small Fries and Great Dragons.

Interestingly, the species has made a name for itself by being one of the most easily recuritable members of the Dragon family. This precedent was set by Lizzie, the very first Hacksaurus introduced in the series and the most popular monstrous companion in the series, outside of the slime family. This theme was reinforced in VIII by Hackzilla, one of the first infamous monsters (on-screen encounter) new players will stumble upon.

Taking this into consideration, it can be assumed that Hacksauri have a high regard for physical strength, and will respect anyone who bests them in battle.


Dragon Quest VI[edit]

#157 - Hacksaurus
Hacksaurus DQVI SNES.gif
HP MP Experience Gold
416 0 698 110
Attack Defense Speed
290 100 115
Dropped Item Seed of strength
Skills Falcon Slash
Bestiary # 157
Game Dragon Quest VI
Console DS

Dragon Quest VIII[edit]

#150 - Hacksaurus
Hacksaurus DQVIII PS2.png
HP MP Experience Gold
171 0 216 55
Attack Defense Speed
155 108 65
Dropped Item Dragon scale (common)
Dragon dung (rare)
Locations Arcadia Region
Royal Hunting Grounds
Skills Flame Breath
Falcon Slash
Family Dragon
Bestiary # 150
Game Dragon Quest VIII
Console PS2
Description Giant axe-toting dragons. Fond of using their sorching flame-breath to roast hapless travellers.

While normal hacksauruses won't be encountered until the player reaches the Royal Hunting Grounds, it is possible to run into a special roaming one near Farebury at the very start of the game. It is ill-advised to fight this hacksaurus until much later on since it can easily wipe out a low-level party using its fire breath and falcon slash techniques, though having a monster team will enable one to recruit the powerful monster after defeating it.

Dragon Quest Monsters[edit]

Dragon Quest Monsters 2[edit]

Dragon Quest Monsters: Caravan Heart[edit]

Dragon Quest Monsters: Joker[edit]

Dragon Quest Monsters: Joker 2[edit]

The hacksaurus is a Rank C monster in Dragon Quest Monsters: Joker 2.

Related Monsters[edit]