Use ice - type attacks and aim for its legs.
Well, in Monster Hunter Stories, if you want to make the most of the Black Diablos' weaknesses, start with your equipment. Make sure you have a weapon or gear that can utilize ice - based attacks effectively. When in battle, keep your distance at first to observe its movements. Notice when it's about to charge or perform a big attack. Right after it does that, it will be a bit vulnerable. That's the time to rush in and target its legs with your ice - type attacks. Also, consider bringing a Monstie that has skills or attacks that complement your ice - based strategy. For example, a Monstie that can stun or paralyze the Black Diablos can give you more time to land your ice - type attacks on its weak points. And don't forget to manage your stamina well, because you need to be able to dodge its powerful attacks while you're exploiting its weaknesses.
To best exploit Basarios' weaknesses in Monster Hunter Stories, first, equip water - based weapons. These will deal extra damage due to its water weakness. Also, try to stay close to its underbelly when attacking as it's a vulnerable area. And don't forget to use items that can inflict status effects like poison, which can further weaken it during the fight.
The Black Diablos is weak to ice. Using ice - based attacks can deal significant damage to it.
Use Thunder - element weapons to best exploit Tigerex's weakness.
Equip water or ice weapons and use attacks related to those elements.
Use Ice - based weapons and attacks.
Equip Ice - element weapons to exploit Rajang's weakness to Ice.
To exploit Rathian's weakness to the Dragon element, use weapons or attacks with Dragon properties. For example, a dragon - element sword or a special move with dragon damage.
In Monster Hunter Stories, Diablos is weak to ice. Using ice - based attacks can deal significant damage to it.
To exploit Barroth's weakness in Monster Hunter Stories, use water - based attacks. You can equip water - element weapons or use Monsties with water - type skills.
Use fire - based weapons or skills to target its weakness.