Ghost

Ghost moves are ×2 against Ghost and Psychic; Ghost Pokémon are immune to Normal and Fighting, resist Bug and Poison, and are weak to Dark and Ghost.

Look up the type matchup matrix View defense in the matrix

Two-way summary

When attacking

×2 Deals more damage: Psychic
Ghost
×½ Deals less damage: Dark
×0 Deals no damage: Normal
×1 Deals normal damage: 14 types take normal damage — see the full table below

When defending

×2 Takes more damage: Ghost
Dark
×½ Takes less damage: Poison
Bug
×0 Immune: Normal
Fighting
×1 Takes normal damage: 12 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
×0 Immune

How does adding Ghost change things?

moves

Gogoat

Gogoat

Grass

Multiplier on Grass: ×1
Result: ×1

Gourgeist (Large Variety)

Gourgeist (Large Variety)

Multiplier on Ghost: ×2
Multiplier on Grass: ×1
Result: ×2