Hi I will include Status Moves and Attacks that lower stats (I will also include Burn moves and Paralyze moves since they drop the Attack and Speed stat:
STATUS
Baby-Doll Eyes
Lowers target's Atk by one stage and has +1 priority
Charm
Lowers the target's Atk by two stages
Confide
Lowers target's Sp. Atk by one stage
Cotton Spore
Lowers target's Speed by two stages
Eerie Impulse
Lowers the target's Sp. Atk by two stages
Fake Tears
Lowers target's Sp. Def by two stages
Feather Dance
Lowers the target's attack stat by two stages
Flash
Lowers the target's accuracy stat by one stage
Flatter
Raises the target's Sp.Atk stat by two stages and confuses it
Glare
Paralyzes target (thus quartering Speed stat)
Growl
Lowers target's Atk stat by one stage
Kinesis
Lowers the target's accuracy by one stage
King's Shield
King's Shield protects the user from any moves except status moves for that turn. Additionally, if King's Shield blocks an attack that would make contact with the user, the attacker's Attack stat drops by 2 stages
Leer
Lowers target's Def stat by one stage
Memento
Memento causes the user to faint and in return lowers the Atk and Sp. Atk stat of the target by two stages each
Metal Sound
Lowers target's Sp. Def by two stages
Noble Roar
Lowers target's Atk and Sp. Atk stats by one stage each
Parting Shot
Lowers the target's Atk and Sp. Atk stats by one stage each, then switches the user out
Play Nice
Lowers target's Atk stat by one stage
Sand Attack
Lowers the target's accuracy by one stage
Scary Face
Lowers the target's Speed stat by two stages
Screech
Lower's the target's Def stat by two stages
Smokescreen
Lowers accuracy stat of target by one stage
String Shot
Lowers target's Speed stat by two stages
Stun Spore
Paralyzes target thus quartering Speed stat
Sweet Scent
Lowers evasion stat of target by one stage
Tail Whip
Lowers target's Def stat by one stage
Thunder Wave
Paralyzes target, quartering the Speed stat
Venom Drench
Lowers Atk, Sp. Atk and Speed stats of a poisoned Pokemon by one stage each
Will-O-Wisp
Burns target, halving Atk stat
DAMAGING MOVES
Blaze Kick
10% chance to burn target (halving Atk stat)
Body Slam
30% chance to paralyze target (quartering Speed stat)
Bolt Strike
20% chance to paralyze target (quartering Speed stat)
Bounce
30% chance to paralyze target (quartering Speed stat)
Bulldoze
100% chance to lower target's Speed stat by one stage
Constrict
10% chance to lower target's Speed stat by one stage
Crunch
20% chance to lower target's Def stat by one stage
Crush Claw
50% chance to lower target's Def by one stage
Fire Fang
10% chance to burn target (thus halving attack stat)
Fire Punch
10% chance to burn target (thus halving attack stat)
Iron Tail
30% chance to lower target's Def stat by one stage
Low Sweep
100% chance to lower target's Speed stat by one stage
Nuzzle
100% chance to paralyze target (thus quartering Speed stat)
Play Rough
10% chance to lower target's Atk stat by one stage
Razor Shell
50% chance to lower target's Def by one stage
Rock Smash
50% chance to lower target's Def by one stage
Rock Tomb
100% chance to lower target's Speed stat by one stage
Sacred Fire
50% chance to burn target (thus halving Atk stat)
Spark
30% chance to paralyze target (thus quartering Speed stat)
Thunder Fang
10% chance to paralyze target (thus quartering Speed stat)
Thunder Punch
10% chance to paralyze target (thus quartering Speed stat)
Volt Tackle
10% chance to paralyze target (thus quartering Speed stat)
Acid Spray
100% chance to lower target's Sp. Def by two stages
Blue Flare
20% to burn target (thus halving Atk stat)
Bug Buzz
10% chance to lower target's Sp. Def by one stage
Discharge
30% chance to paralyze target (thus quartering Speed stat)
Dragon Breath
30% chance to paralyze target (thus quartering Speed stat)
Earth Power
10% chance to lower target's Sp. Def stat by one stage
Electroweb
100% chance to lower target's speed by one stage
Energy Ball
10% chance to lower target's Sp. Def by one stage
Ember
10% chance to burn the target (thus halving the Atk stat)
Fire Blast
10% chance to burn the target (thus halving the Atk stat)
Flamethrower
10% chance to burn the target (thus halving the Atk stat)
Flash Cannon
10% chance to lower target's Sp. Def by one stage
Focus Blast
10% chance to lower target's Sp. Def by one stage
Glaciate
100% chance to lower target's Speed stat by one stage
Heat Wave
10% chance to burn the target (thus halving the Atk stat)
Icy Wind
100% chance to lower target's Speed stat by one stage
Lava Plume
30% chance to burn the target (thus halving the Atk stat)
Leaf Tornado
50% chance to lower target's accuracy stat by one stage
Luster Purge
50% chance to lower target's Sp. Def stat by one stage
Mist Ball
50% chance to lower target's Sp. Atk stat by one stage
Moonblast
30% chance to lower target's Sp. Atk stat by one stage
Mud Bomb
30% chance to lower target's accuracy stat by one stage
Mud Shot
100% chance to lower target's Speed stat by one stage
Mud Slap
100% chance to lower target's accuracy by one stage
Muddy Water
30% chance to lower target's accuracy stat by one stage
Mystical Fire
100% chance to lower target's Sp. Atk stat by one stage
Psychic
10% chance to lower target's Sp. Def stat by one stage
Scald
30% chance to burn target (thus halving Atk stat)
Searing Shot
30% chance to burn target (thus halving Atk stat)
Shadow Ball
20% chacne to lower target's Sp. Def by one stage
Snarl
100% chance to lower target's Sp. Atk by one stage
Steam Eruption
30% chance to burn target (thus halving Atk stat)
Thunderbolt
10% chance to paralyze target (thus quartering Speed stat)
Thunder Shock
10% chance to paralyze target (thus quartering Speed stat)
Thunder
30% chance to paralyze target (thus quartering Speed stat)
Zap Cannon
100% chance to paralyze target (thus quartering Speed stat)
HOPE THIS HELPED
Source: Bulbapedia
