Grass

Grass moves are ×2 against Ground, Rock and Water; Grass Pokémon resist Electric, Grass, Ground and Water, and are weak to Bug, Fire, Flying, Ice and Poison.

Look up the type matchup matrix View defense in the matrix

Two-way summary

When attacking

×2 Deals more damage: Water
Ground
Rock
×½ Deals less damage: Fire
Grass
Poison
Flying
Bug
Dragon
Steel
×1 Deals normal damage: 8 types take normal damage — see the full table below

When defending

×2 Takes more damage: Fire
Ice
Poison
Flying
Bug
×½ Takes less damage: Water
Electric
Grass
Ground
×1 Takes normal damage: 9 types deal normal damage — see the full table below

These multipliers describe how a move interacts with the defending type in the current reference chart; they are not final damage and have not been verified for Pokémon Champions.

×2 Super effective
×1 Normal damage
×½ Not very effective

How does adding Grass change things?

moves

Cofagrigus

Cofagrigus

Ghost

Multiplier on Ghost: ×1
Result: ×1

Gourgeist (Small Variety)

Gourgeist (Small Variety)

Multiplier on Ghost: ×1
Multiplier on Grass: ×½
Result: ×½