Grassy Glide is learned by 82 species by machine and 62 by tutor

Effect, in PokéAPI's words

“If Grassy Terrain is active and the user is grounded, this move has has its priority increased by 1.”

Who learns it

100 species in all, 2 games

Scarlet and Violet: 82 species

Species	Method	Level
Bulbasaur	Machine
Ivysaur	Machine
Venusaur	Machine
Oddish	Machine
Gloom	Machine
Vileplume	Machine
Bellsprout	Machine
Weepinbell	Machine
Victreebel	Machine
Exeggcute	Machine
Exeggutor	Machine
Mew	Machine
Chikorita	Machine
Bayleef	Machine
Meganium	Machine
Bellossom	Machine
Sunflora	Machine
Treecko	Machine
Grovyle	Machine
Sceptile	Machine
Lotad	Machine
Lombre	Machine
Ludicolo	Machine
Seedot	Machine
Nuzleaf	Machine
Shiftry	Machine
Cacnea	Machine
Cacturne	Machine
Turtwig	Machine
Grotle	Machine
Torterra	Machine
Snover	Machine
Abomasnow	Machine
Leafeon	Machine
Shaymin	Machine
Snivy	Machine
Servine	Machine
Serperior	Machine
Sewaddle	Machine
Swadloon	Machine
Leavanny	Machine
Cottonee	Machine
Whimsicott	Machine
Petilil	Machine
Lilligant	Machine
Deerling	Machine
Sawsbuck	Machine
Virizion	Machine
Chespin	Machine
Quilladin	Machine
Chesnaught	Machine
Skiddo	Machine
Gogoat	Machine
Phantump	Machine
Trevenant	Machine
Rowlet	Machine
Dartrix	Machine
Decidueye	Machine
Fomantis	Machine
Lurantis	Machine
Bounsweet	Machine
Steenee	Machine
Tsareena	Machine
Comfey	Machine
Grookey	Machine
Thwackey	Machine
Rillaboom	Machine
Flapple	Machine
Appletun	Machine
Zarude	Machine
Sprigatito	Machine
Floragato	Machine
Meowscarada	Machine
Bramblin	Machine
Brambleghast	Machine
Toedscool	Machine
Toedscruel	Machine
Capsakid	Machine
Scovillain	Machine
Dipplin	Machine
Ogerpon	Machine
Hydrapple	Machine

Sword and Shield: 62 species

Species	Method	Level
Bulbasaur	Tutor
Ivysaur	Tutor
Venusaur	Tutor
Oddish	Tutor
Gloom	Tutor
Vileplume	Tutor
Exeggcute	Tutor
Exeggutor	Tutor
Tangela	Tutor
Mew	Tutor
Bellossom	Tutor
Celebi	Tutor
Treecko	Tutor
Grovyle	Tutor
Sceptile	Tutor
Lotad	Tutor
Lombre	Tutor
Ludicolo	Tutor
Seedot	Tutor
Nuzleaf	Tutor
Shiftry	Tutor
Roselia	Tutor
Budew	Tutor
Roserade	Tutor
Cherubi	Tutor
Cherrim	Tutor
Snover	Tutor
Abomasnow	Tutor
Tangrowth	Tutor
Leafeon	Tutor
Cottonee	Tutor
Whimsicott	Tutor
Petilil	Tutor
Lilligant	Tutor
Maractus	Tutor
Virizion	Tutor
Phantump	Tutor
Trevenant	Tutor
Pumpkaboo	Tutor
Gourgeist	Tutor
Rowlet	Tutor
Dartrix	Tutor
Decidueye	Tutor
Fomantis	Tutor
Lurantis	Tutor
Bounsweet	Tutor
Steenee	Tutor
Tsareena	Tutor
Comfey	Tutor
Dhelmise	Tutor
Grookey	Tutor
Thwackey	Tutor
Rillaboom	Tutor
Gossifleur	Tutor
Eldegoss	Tutor
Wooloo	Tutor
Dubwool	Tutor
Applin	Tutor
Flapple	Tutor
Appletun	Tutor
Sirfetch’d	Tutor
Zarude	Tutor