Aggron's Weaknesses

Best Counters

Aggron is especially weak against Fighting and Ground type Pokemon, they will deal 4x damage to it!

The types that are strong against Aggron are Fighting, Ground, Water type Pokemon.

For the best defense, Steel types have very effective defense against Aggron, and will be resistant to damage from Aggron's STAB attacks:

Weaknesses

Aggron's type is Steel and Rock.

Aggron is especially vulnerable to Fighting and Ground attacks, it will receive a super effective four times (4x) the amount of damage! Since Fighting and Ground type Pokemon are especially strong against Aggron, you should attack with this type of Pokemon.

Aggron has a weakness to Fighting, Ground, Water types. These Pokemon types will be strong against Aggron, causing Aggron to take a super effective quadruple (4x) damage from Fighting and Ground type attacks, and causing Aggron to take a super effective double (2x) damage from Water type attacks.

Poison type attacks will have no effect on Aggron, as Aggron is immune to this type of damage! Please avoid these types of attacks.

Please keep in mind that Aggron is resistant to attacks from Dragon, Fairy, Ice, Psychic, Rock, Bug, Flying, Normal types, and these attacks are not very effective and cause reduced damage, so they should be avoided.