Iron Leaves' Weaknesses

Best Counters

Iron Leaves is especially weak against Bug type Pokemon, they will deal 4x damage to it!

The types that are strong against Iron Leaves are Bug, Dark, Fire, Flying, Ghost, Ice type Pokemon.

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

Poison types will also deal super-effective damage against Iron Leaves, but be careful using Pokemon of this type because they may also receive extra damage from some of Iron Leaves' attacks!

Weaknesses

Iron Leaves' type is Grass and Psychic.

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

Iron Leaves has a weakness to Bug, Dark, Fire, Flying, Ghost, Ice, Poison types. These Pokemon types will be strong against Iron Leaves, causing Iron Leaves to take a super effective quadruple (4x) damage from Bug type attacks, and causing Iron Leaves to take a super effective double (2x) damage from Dark, Fire, Flying, Ghost, Ice, Poison type attacks.

Please keep in mind that Iron Leaves is resistant to attacks from Electric, Fighting, Grass, Ground, Psychic, Water types, and these attacks are not very effective and cause reduced damage, so they should be avoided.