In other gens:

Screech

Type	Normal
Category	Non-Damaging
Power	—
Accuracy	85%
Priority	0
PP	40

Lowers the target's Defense by 2 stages.

Targets: Any adjacent.

Move flags:

Can be selected by Metronome.
Can be copied by Mirror Move.
Blocked by protection moves.
Bounced back to the original user by Magic Coat or the Magic Bounce Ability.
Has no effect on Pokemon with the Soundproof Ability.

(Inadequate description? Let us know in this thread.)

Pokemon

Aipom

Normal

Run Away
No competitive use.

Pickup
No competitive use.

Atk

Def

SpA

SpD

Spe

Ampharos

Electric

Static
1/3 chance a Pokemon making contact with this Pokemon will be paralyzed.

Atk

Def

SpA

115

SpD

Spe

Arbok

Poison

Intimidate
On switch-in, this Pokemon lowers the Attack of opponents by 1 stage.

Shed Skin
This Pokemon has a 33% chance to have its status cured at the end of each turn.

Atk

Def

SpA

SpD

Spe

Banette

Ghost

Insomnia
This Pokemon cannot fall asleep. Gaining this Ability while asleep cures it.

Atk

115

Def

SpA

SpD

Spe

Carvanha

Rough Skin
Pokemon making contact with this Pokemon lose 1/16 of their max HP.

Atk

Def

SpA

SpD

Spe

Chinchou

Volt Absorb
This Pokemon heals 1/4 its max HP when hit by a damaging Electric move; immunity.

Illuminate
No competitive use.

Atk

Def

SpA

SpD

Spe

Cloyster

Shell Armor
This Pokemon cannot be struck by a critical hit.

Atk

Def

180

SpA

SpD

Spe

Corsola

Hustle
This Pokemon's Attack is 1.5x and accuracy of its physical attacks is 0.8x.

Natural Cure
This Pokemon has its non-volatile status condition cured when it switches out.

Atk

Def

SpA

SpD

Spe

Crobat

Inner Focus
This Pokemon cannot be made to flinch.

UUBL

Atk

Def

SpA

SpD

Spe

130

Croconaw

Water

Torrent
At 1/3 or less of its max HP, this Pokemon's Water-type attacks have 1.5x power.

Atk

Def

SpA

SpD

Spe

Cubone

Ground

Rock Head
This Pokemon does not take recoil damage besides Struggle and crash damage.

Lightning Rod
This Pokemon draws single-target Electric moves used by opponents to itself.

Atk

Def

SpA

SpD

Spe

Diglett

Ground

Sand Veil
If Sandstorm is active, this Pokemon's evasiveness is 1.25x; immunity to Sandstorm.

Arena Trap
Prevents opposing Pokemon from choosing to switch out unless they are airborne.

Atk

Def

SpA

SpD

Spe

Dugtrio

Ground

Sand Veil
If Sandstorm is active, this Pokemon's evasiveness is 1.25x; immunity to Sandstorm.

Arena Trap
Prevents opposing Pokemon from choosing to switch out unless they are airborne.

Atk

Def

SpA

SpD

Spe

120

Dunsparce

Normal

Serene Grace
This Pokemon's moves have their secondary effect chance doubled.

Run Away
No competitive use.

PUBL

100

Atk

Def

SpA

SpD

Spe

Ekans

Poison

Intimidate
On switch-in, this Pokemon lowers the Attack of opponents by 1 stage.

Shed Skin
This Pokemon has a 33% chance to have its status cured at the end of each turn.

Atk

Def

SpA

SpD

Spe

Electabuzz

Electric

Static
1/3 chance a Pokemon making contact with this Pokemon will be paralyzed.

Atk

Def

SpA

SpD

Spe

105

Electrode

Electric

Soundproof
This Pokemon is immune to sound-based moves, including Heal Bell.

Static
1/3 chance a Pokemon making contact with this Pokemon will be paralyzed.

Atk

Def

SpA

SpD

Spe

140

Elekid

Electric

Static
1/3 chance a Pokemon making contact with this Pokemon will be paralyzed.

Atk

Def

SpA

SpD

Spe

Exploud

Normal

Soundproof
This Pokemon is immune to sound-based moves, including Heal Bell.

104

Atk

Def

SpA

SpD

Spe

Feraligatr

Water

Torrent
At 1/3 or less of its max HP, this Pokemon's Water-type attacks have 1.5x power.

Atk

105

Def

100

SpA

SpD

Spe

Flaaffy

Electric

Static
1/3 chance a Pokemon making contact with this Pokemon will be paralyzed.

Atk

Def

SpA

SpD

Spe

Flygon

Levitate
This Pokemon is immune to Ground.

Atk

100

Def

SpA

SpD

Spe

100

Gligar

Hyper Cutter
Prevents other Pokemon from lowering this Pokemon's Attack stat stage.

Sand Veil
If Sandstorm is active, this Pokemon's evasiveness is 1.25x; immunity to Sandstorm.

Atk

Def

105

SpA

SpD

Spe

Golbat

Inner Focus
This Pokemon cannot be made to flinch.

Atk

Def

SpA

SpD

Spe

Golduck

Water

Damp
Prevents Explosion and Self-Destruct while this Pokemon is active.

Cloud Nine
While this Pokemon is active, the effects of weather conditions are disabled.

Atk

Def

SpA

SpD

Spe

Grimer

Poison

Stench
No competitive use.

Sticky Hold
This Pokemon cannot lose its held item due to another Pokemon's Ability or attack.

Atk

Def

SpA

SpD

Spe

Grovyle

Grass

Overgrow
At 1/3 or less of its max HP, this Pokemon's Grass-type attacks have 1.5x power.

Atk

Def

SpA

SpD

Spe

Huntail

Water

Swift Swim
If Rain Dance is active, this Pokemon's Speed is doubled.

Atk

104

Def

105

SpA

SpD

Spe

Kecleon

Normal

Color Change
This Pokemon's type changes to the type of a move it's hit by, unless it has the type.

Atk

Def

SpA

SpD

120

Spe

Koffing

Poison

Levitate
This Pokemon is immune to Ground.

Atk

Def

SpA

SpD

Spe

Lanturn

Volt Absorb
This Pokemon heals 1/4 its max HP when hit by a damaging Electric move; immunity.

Illuminate
No competitive use.

125

Atk

Def

SpA

SpD

Spe

Larvitar

Guts
If this Pokemon is statused, its Attack is 1.5x; ignores burn halving physical damage.

Atk

Def

SpA

SpD

Spe

Lickitung

Normal

Own Tempo
This Pokemon cannot be confused.

Oblivious
This Pokemon cannot be infatuated. Gaining this Ability while infatuated cures it.

Atk

Def

SpA

SpD

Spe

Loudred

Normal

Soundproof
This Pokemon is immune to sound-based moves, including Heal Bell.

Atk

Def

SpA

SpD

Spe

Magby

Fire

Flame Body
1/3 chance a Pokemon making contact with this Pokemon will be burned.

Atk

Def

SpA

SpD

Spe

Magmar

Fire

Flame Body
1/3 chance a Pokemon making contact with this Pokemon will be burned.

Atk

Def

SpA

100

SpD

Spe

Magnemite

Magnet Pull
Prevents Steel-type Pokemon from choosing to switch out, other than this Pokemon.

Sturdy
OHKO moves fail when used against this Pokemon.

Atk

Def

SpA

SpD

Spe

Magneton

Magnet Pull
Prevents Steel-type Pokemon from choosing to switch out, other than this Pokemon.

Sturdy
OHKO moves fail when used against this Pokemon.

Atk

Def

SpA

120

SpD

Spe

Mankey

Fighting

Vital Spirit
This Pokemon cannot fall asleep. Gaining this Ability while asleep cures it.

Atk

Def

SpA

SpD

Spe

Mareep

Electric

Static
1/3 chance a Pokemon making contact with this Pokemon will be paralyzed.

Atk

Def

SpA

SpD

Spe

Marowak

Ground

Rock Head
This Pokemon does not take recoil damage besides Struggle and crash damage.

Lightning Rod
This Pokemon draws single-target Electric moves used by opponents to itself.

UUBL

Atk

Def

110

SpA

SpD

Spe

Meowth

Normal

Pickup
No competitive use.

Atk

Def

SpA

SpD

Spe

Misdreavus

Ghost

Levitate
This Pokemon is immune to Ground.

Atk

Def

SpA

SpD

Spe

Muk

Poison

Stench
No competitive use.

Sticky Hold
This Pokemon cannot lose its held item due to another Pokemon's Ability or attack.

105

Atk

105

Def

SpA

SpD

100

Spe

Ninjask

Speed Boost
This Pokemon's Speed is raised 1 stage at the end of each full turn on the field.

RUBL

Atk

Def

SpA

SpD

Spe

160

Octillery

Water

Suction Cups
This Pokemon cannot be forced to switch out by another Pokemon's attack or item.

Atk

105

Def

SpA

105

SpD

Spe

Onix

Rock Head
This Pokemon does not take recoil damage besides Struggle and crash damage.

Sturdy
OHKO moves fail when used against this Pokemon.

Atk

Def

160

SpA

SpD

Spe

Paras

Effect Spore
10% chance of poison/paralysis/sleep on others making contact with this Pokemon.

Atk

Def

SpA

SpD

Spe

Parasect

Effect Spore
10% chance of poison/paralysis/sleep on others making contact with this Pokemon.

Atk

Def

SpA

SpD

Spe

Persian

Normal

Limber
This Pokemon cannot be paralyzed. Gaining this Ability while paralyzed cures it.

Atk

Def

SpA

SpD

Spe

115

Primeape

Fighting

Vital Spirit
This Pokemon cannot fall asleep. Gaining this Ability while asleep cures it.

Atk

105

Def

SpA

SpD

Spe

Psyduck

Water

Damp
Prevents Explosion and Self-Destruct while this Pokemon is active.

Cloud Nine
While this Pokemon is active, the effects of weather conditions are disabled.

Atk

Def

SpA

SpD

Spe

Pupitar

Shed Skin
This Pokemon has a 33% chance to have its status cured at the end of each turn.

Atk

Def

SpA

SpD

Spe

Raticate

Normal

Run Away
No competitive use.

Guts
If this Pokemon is statused, its Attack is 1.5x; ignores burn halving physical damage.

Atk

Def

SpA

SpD

Spe

Rattata

Normal

Run Away
No competitive use.

Guts
If this Pokemon is statused, its Attack is 1.5x; ignores burn halving physical damage.

Atk

Def

SpA

SpD

Spe

Remoraid

Water

Hustle
This Pokemon's Attack is 1.5x and accuracy of its physical attacks is 0.8x.

Atk

Def

SpA

SpD

Spe

Sceptile

Grass

Overgrow
At 1/3 or less of its max HP, this Pokemon's Grass-type attacks have 1.5x power.

UUBL

Atk

Def

SpA

105

SpD

Spe

120

Seviper

Poison

Shed Skin
This Pokemon has a 33% chance to have its status cured at the end of each turn.

Atk

100

Def

SpA

100

SpD

Spe

Sharpedo

Rough Skin
Pokemon making contact with this Pokemon lose 1/16 of their max HP.

Atk

120

Def

SpA

SpD

Spe

Shedinja

Wonder Guard
This Pokemon is only damaged by supereffective moves and indirect damage.

ZUBL

Atk

Def

SpA

SpD

Spe

Shellder

Water

Shell Armor
This Pokemon cannot be struck by a critical hit.

Atk

Def

100

SpA

SpD

Spe

Shuppet

Ghost

Insomnia
This Pokemon cannot fall asleep. Gaining this Ability while asleep cures it.

Atk

Def

SpA

SpD

Spe

Sneasel

Inner Focus
This Pokemon cannot be made to flinch.

Keen Eye
Prevents other Pokemon from lowering this Pokemon's accuracy stat stage.

Atk

Def

SpA

SpD

Spe

115

Steelix

Rock Head
This Pokemon does not take recoil damage besides Struggle and crash damage.

Sturdy
OHKO moves fail when used against this Pokemon.

UUBL

Atk

Def

200

SpA

SpD

Spe

Tentacool

Clear Body
Prevents other Pokemon from lowering this Pokemon's stat stages.

Liquid Ooze
This Pokemon damages those draining HP from it for as much as they would heal.

Atk

Def

SpA

SpD

100

Spe

Tentacruel

Clear Body
Prevents other Pokemon from lowering this Pokemon's stat stages.

Liquid Ooze
This Pokemon damages those draining HP from it for as much as they would heal.

Atk

Def

SpA

SpD

120

Spe

100

Totodile

Water

Torrent
At 1/3 or less of its max HP, this Pokemon's Water-type attacks have 1.5x power.

Atk

Def

SpA

SpD

Spe

Treecko

Grass

Overgrow
At 1/3 or less of its max HP, this Pokemon's Grass-type attacks have 1.5x power.

Atk

Def

SpA

SpD

Spe

Tyranitar

Sand Stream
On switch-in, this Pokemon summons Sandstorm.

100

Atk

134

Def

110

SpA

SpD

100

Spe

Umbreon

Dark

Synchronize
If another Pokemon burns/poisons/paralyzes this Pokemon, it also gets that status.

UUBL

Atk

Def

110

SpA

SpD

130

Spe

Venomoth

Shield Dust
This Pokemon is not affected by the secondary effect of another Pokemon's attack.

Atk

Def

SpA

SpD

Spe

Venonat

Compound Eyes
This Pokemon's moves have their accuracy multiplied by 1.3.

Atk

Def

SpA

SpD

Spe

Vibrava

Levitate
This Pokemon is immune to Ground.

Atk

Def

SpA

SpD

Spe

Voltorb

Electric

Soundproof
This Pokemon is immune to sound-based moves, including Heal Bell.

Static
1/3 chance a Pokemon making contact with this Pokemon will be paralyzed.

Atk

Def

SpA

SpD

Spe

100

Weezing

Poison

Levitate
This Pokemon is immune to Ground.

UUBL

Atk

Def

120

SpA

SpD

Spe

Whismur

Normal

Soundproof
This Pokemon is immune to sound-based moves, including Heal Bell.

Atk

Def

SpA

SpD

Spe

Yanma

Speed Boost
This Pokemon's Speed is raised 1 stage at the end of each full turn on the field.

Compound Eyes
This Pokemon's moves have their accuracy multiplied by 1.3.

ZUBL

Atk

Def

SpA

SpD

Spe