Virizion's Weaknesses

Best Counters

Virizion is especially weak against Flying type Pokemon, they will deal 4x damage to it!

The types that are strong against Virizion are Flying, Fairy, Fire, Poison, Psychic type Pokemon.

For the best defense, Flying, Poison, Bug types have very effective defense against Virizion, and will be resistant to damage from Virizion's STAB attacks:

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

Weaknesses

Virizion's type is Grass and Fighting.

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

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

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