Grass type
Grass-type Pokémon are weak to Fire, Ice, Poison, Flying, and Bug moves. They resist Water, Electric, Grass, and Ground. Grass moves are super effective against Water, Ground, and Rock.

Grass weaknesses
Moves used against a Grass-type Pokémon
Grass moves
Grass moves against each type
Every Grass-type Pokémon
Bulbasaur
Ivysaur
Venusaur
Mega Venusaur
Oddish
Gloom
Vileplume
Paras
Parasect
Bellsprout
Weepinbell
Victreebel
Mega Victreebel
Hisuian Voltorb
Hisuian Electrode
Exeggcute
Exeggutor
Alolan Exeggutor
Tangela
Chikorita
Bayleef
Meganium
Mega Meganium
Bellossom
Hoppip
Skiploom
Jumpluff
Sunkern
Sunflora
Celebi
Treecko
Grovyle
Sceptile
Mega Sceptile
Lotad
Lombre
Ludicolo
Seedot
Nuzleaf
Shiftry
Shroomish
Breloom
Roselia
Cacnea
Cacturne
Lileep
Cradily
Tropius
Turtwig
Grotle
Torterra
Budew
Roserade
Wormadam
Cherubi
Cherrim
Carnivine
Snover
Abomasnow
Mega Abomasnow
Tangrowth
Leafeon
Mow Rotom
Shaymin
Shaymin (Sky Forme)
Snivy
Servine
Serperior
Pansage
Simisage
Sewaddle
Swadloon
Leavanny
Cottonee
Whimsicott
Petilil
Lilligant
Hisuian Lilligant
Maractus
Deerling
Sawsbuck
Foongus
Amoonguss
Ferroseed
Ferrothorn
Virizion
Chespin
Quilladin
Chesnaught
Mega Chesnaught
Skiddo
Gogoat
Phantump
Trevenant
Pumpkaboo
Pumpkaboo (Small Size)
Pumpkaboo (Large Size)
Pumpkaboo (Super Size)
Gourgeist
Gourgeist (Small Size)
Gourgeist (Large Size)
Gourgeist (Super Size)
Rowlet
Dartrix
Decidueye
Hisuian Decidueye
Fomantis
Lurantis
Morelull
Shiinotic
Bounsweet
Steenee
Tsareena
Dhelmise
Tapu Bulu
Kartana
Grookey
Thwackey
Rillaboom
Gossifleur
Eldegoss
Applin
Flapple
Appletun
Zarude
Calyrex
Sprigatito
Floragato
Meowscarada
Smoliv
Dolliv
Arboliva
Bramblin
Brambleghast
Toedscool
Toedscruel
Capsakid
Scovillain
Mega Scovillain
Brute Bonnet
Wo-Chien
Iron Leaves
Dipplin
Poltchageist
Sinistcha
Ogerpon
Ogerpon (Wellspring Mask)
Ogerpon (Hearthflame Mask)
Ogerpon (Cornerstone Mask)
Hydrapple