Dual Horn appears as an enemy on the world map outside the Temple of the Ancients. It uses strong physical attacks and has a high amount of HP. It can also be fought in the Battle Square in the Gold Saucer, where its stats are increased, giving it double the amount of HP and 25% more Attack and Magic Attack power.
Dual Horns appear in four Extra Missions: Wastelings, Boxemon, Drumline, and Two-Handed. They are best approached from behind and their weak point is on their underbelly.
Dual Horns appear in the missions M6-3-1 - Items in the Plains and M8-4-6 - Suspicious Mail 6. They are constantly under the Endure status. They can use the ability Bad Odor to inflict Poison, Curse, and Silence.
Dual Horns can be found on the Mi'ihen Highroad. Its Gore ability is very strong, and its Fire Breath ability can be learned by Kimahri Ronso. Stronger versions of the Dual Horn appears during the Siege of Home, with higher HP, Speed, and Strength.
Dualhorn is fought in Leide east of Hammerhead, southeast of The Three Valleys, around Longwythe Peak, and during the Hunts Beast Over Brawn and Horned Hunting Hazards in the Longwythe Rest Area. It is a level 12 and level 23 enemy with decent strength and a 50% chance to drop 5 Ices.