Type Matchup Summary
As a Rock/Water-type Pokemon, Omastar has 4 weaknesses, 5 resistances.
Normal
0.5×
Fighting
2×
Flying
0.5×
Poison
0.5×
Ground
2×
Rock
1×
Bug
1×
Ghost
1×
Steel
1×
Fire
0.25×
Water
1×
Grass
4×
Electric
2×
Psychic
1×
Ice
0.5×
Dragon
1×
Dark
1×
Fairy
1×
How to Beat Omastar
Use Grass-type moves for 4× super effective damage — the most efficient way to KO Omastar.
Alternatively, use Fighting, Ground, Electric-type moves for 2× super effective damage.