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I was curious and wanted to know about all the moves positively and negatively affected by weather and terrain. I don't mean any Water- or Fire-type moves that get boosted in the sun or rain. I mean a move like Thunder that gets boosted accuracy in the rain or Grassy Glide gets priority in Grassy Terrain.

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Weather Ball changes type, Terrain Pulse changes type, Earthquake's power is halved in Grassy Terrain, Priority moves fail in psychic terrain

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This answer assumes the games in question are Scarlet and Violet, unless otherwise noted. Details between other games may differ from what is shown here.

Harsh Sunlight

  • Boosts the amount of HP Synthesis, Moonlight, and Morning Sun heal.

  • Thunder and Hurricane have 50% accuracy.

  • Solar Beam and Solar Blade become one-turn moves.

  • Growth boosts Attack and Special Attack sharply.

Sandstorm

  • Shore Up restores more HP.

Rain

  • Thunder and Hurricane get perfect accuracy.

  • [Diamond and Pearl] Thunder has a 30% chance to hit through Protect or Detect when used in rain.

Snow/Hail

  • Permits the use of Aurora Veil.

  • Blizzard gets perfect accuracy.

  • [Diamond and Pearl] Blizzard has a 30% chance to hit through Protect or Detect when used in hail.

Fog

  • [Gen IV] Weather Ball's power doubles.

  • [Gen IV] All moves set to 3/5 their original accuracy.

  • [Legends: Arceus] All moves' accuracy decreased by an unknown amount.

[Only in games with Desolate Land] Extremely Harsh Sunlight

  • Prevents the use of any Water type move. This includes Natural Gift with a "Water" type berry.

[Only in games with Primordial Sea] Heavy Rain

  • Prevents the use of any Fire type move. This includes Natural Gift with a "Fire" type berry.

[Only in games with Delta Stream] Strong Winds

  • Forces moves that are super effective against Flying types to deal neutral damage.

[Pokemon XD: Gale of Darkness] Shadowy Aura

  • Weather Ball's power doubles and becomes a typeless move.

Snow/Hail, Sandstorm, Rain (and Gen IV Fog)

  • Morning Sun, Synthesis, and Moonlight restore less HP.

  • Solar Beam and Solar Blade have their power halved.

Harsh Sunlight, Sandstorm, Rain, and Snow (Hail)

  • Weather Ball's power doubles and changes to a different type depending on the active weather.

[Only in games with Desolate Land, Primordial Sea, and Delta Stream] Extremely Harsh Sunlight and Heavy Rain

  • A Pokemon afflicted by Powder that attempts to use Sunny Day will take damage.

[Only in games with Desolate Land, Primordial Sea, and Delta Stream] Extremely Harsh Sunlight, Heavy Rain, and Strong Winds

  • Prevents the use of Sunny Day, Rain Dance, Sandstorm, and Hail.

Weather (Bulbapedia)


Electric Terrain

  • All sleep-inducing moves fail (including Yawn).

  • Rising Voltage's power doubles.

Grassy Terrain

  • Halves damage taken from Bulldoze, Earthquake, and Magnitude.

  • Grassy Glide has increased priority.

  • Floral Healing restores more HP.

Misty Terrain

  • Grounded Pokemon take half damage from Dragon moves.

  • Misty Explosion's power increases by 50%.

  • Grounded Pokemon can't be affected by non-volatile status conditions.

  • Grounded Pokemon can't be afflicted with confusion.

Psychic Terrain

  • Grounded Pokemon are immune to priority moves.

  • Expanding Force's power is doubled and hits all opponents.

All terrains

  • Terrain Pulse doubles power and changes type based on active Terrain.

  • Steel Roller only works when a Terrain is active.

  • Nature Power turns into a different move depending on the Terrain.

  • Secret Power's effects differ based on the active Terrain.

  • Camouflage changes the user's type based on the active Terrain.

  • Defog, Splintered Stormshards, and G-Max Wind Rage clear the active Terrain.

Terrain (Bulbapedia)

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What about Steel Roller or does that not count
Edited!
You forgot weather ball and defog.
Edited again!
Splintered Stormshards and G-Max Wind Rage maybe