Ability₂₁₅-Serene Grace (ft. Combos & Counters)

Serene Grace will double (ₓ2) the chance of a move having an additional (Secondary) Effect.
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📑Example:
❎Psychic will have a 20% chance of ↓ Target's Sp. Def stat instead of its usual 10% chance,
❎Charge Beam will always ↑ User's Sp. Atk Stat 1 level, as opposed to 70%.
⚠️Serene Grace has no effect on Status Moves.
🟢Gen³⁻⁴
The 10% flinch chance due to King's Rock and Razor Fang is unaffected by Serene Grace.
🔴Gen⁵⁻⁸
Until Pokémon SwSh, if the user has Serene Grace and uses Charge Beam while under the effect of the 🌈 from Fire Pledge and Water Pledge's combo, the additional effect chance for Charge Beam will overflow and become 24%.
🔵Gen⁵⁺
Serene Grace boosts the 10% flinch chance due to King's Rock or Razor Fang to 20%.
Serene Grace does not ↑ probabilities for Gᴹᵃˣ Replenish/Gᴹᵃˣ Snooze.
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Affected Moves:
🧮Air Slash/Flinch 30% → 60%
🧮Ancient Power/All Stats ↑ 10% → 20%
🧮Astonish/Flinch 30% → 60%
🧮Bite/Flinch 30% → 60%
🧮Blizzard❄️10% → 20%
🧮Body Slam⚡30% → 60%
🧮Bounce⚡30% → 60%
🧮Charge Beam/Sp. Atk↑ 70% → 100%
🧮Confusion🐤10% → 20%
🧮Dragon Rush/Flinch 20% → 40%
🧮Earth Power/Sp. Def↓ 10% → 20%
🧮Energy Ball/Sp. Def↓ 10% → 20%
🧮Extrasensory/Flinch 10% → 20%
🧮Fire Blast🔥10% → 20%
🧮Fire Punch🔥10% → 20%
🧮Flamethrower🔥10% → 20%
🧮Flash Cannon/Sp. Def↓ 10% → 20%
🧮Focus Blast/Sp. Def↓ 10% → 20%
🧮Headbutt/Flinch 30% → 60%
🧮Heart Stamp/Flinch 30% → 60%
🧮Heat Wave🔥10% → 20%
🧮Ice Beam❄️10% → 20%
🧮Ice Punch❄️10% → 20%
🧮Iron Head/Flinch 30% → 60%
🧮Iron Tail/Def↓ 10% → 20%
🧮Meteor Mash/Atk↑ 20% → 40%
🧮Moonblast/Sp. Atk↓ 30% → 60%
🧮Ominous Wind/All Stats↑ 10% → 20%
🧮Play Rough/Atk↓ 10% → 20%
🧮Poison Jab💀30% → 60%
🧮Poison Tail💀10% → 20%
🧮Psybeam🐤10% → 20%
🧮Psychic/Sp. Def. ↓ 10% → 20%
🧮Relic Song💤10% → 20%
🧮Rock Climb🐤20% → 40%
🧮Rock Slide/Flinch 30% → 60%
🧮Rock Smash/Def↓ 50% → 100%
🧮Secret Power/Varies 30% → 60%
🧮Seed Flare/Sp. Def↓↓ 40% → 80%
🧮Shadow Ball/Sp. Def ↓ 20% → 40%
🧮Signal Beam🐤10% → 20%
🧮Silver Wind/All Stats ↑ 10% → 20%
🧮Sky Attack/Flinch 30% → 60%
🧮Snore/Flinch 30% → 60%
🧮Steel Wing/Def↑ 10% → 20%
🧮Thunder⚡30% → 60%
🧮Thunderbolt⚡10% → 20%
🧮Thunder Punch⚡10% → 20%
🧮Tri Attack/Varies 20% → 40%
🧮Twister/Flinch 20% → 40%
🧮Water Pulse🐤20% → 40%
🧮Zen Headbutt/Flinch 20% → 40%
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🧮The following moves below currently cannot be learned by any Pokémon with Serene Grace (List Below⤵️):
🧮They may, however, be called via Metronome, Mirror Move, Copycat, or Mimic, or gained by Trace, Receiver, Skill Swap or Role Play:
🧮Acid/Sp. Def↓ 10% → 20%
🧮Aurora Beam/Atk↓ 10% → 20%
🧮Axe Kick🐤30% → 60%
🧮Barb Barrage💀50% → 100%
🧮Blaze Kick🔥10% → 20%
🧮Bleakwind Storm/Speed↓ 30% → 60%
🧮Blue Flare🔥20% → 40%
🧮Bolt Strike⚡20% → 40%
🧮Bone Club/Flinch 10% → 20%
🧮Bubble/Speed↓ 10% → 20%
🧮Bubble Beam/Speed↓ 10% → 20%
🧮Bug Buzz/Sp. Def↓ 10% → 20%
🧮Constrict/Speed↓ 10% → 20%
🧮Chatter🐤10% → 20%
🧮Cross Poison💀10% → 20%
🧮Crunch/Def↓ 20% → 40%
🧮Crush Claw/Def↓ 50% → 100%
🧮Dark Pulse/Flinch 20% → 40%
🧮Diamond Storm/Def↑↑ 50% → 100%
🧮Discharge⚡30% → 60%
🧮Dizzy Punch🐤20% → 40%
🧮Dire Claw/Varies 50% → 100%
🧮Double Iron Bash/Flinch 30% → 60%
🧮Dragon Breath⚡30% → 60%
🧮Ember🔥10% → 20%
🧮Fiery Dance/Sp. Atk↑ 50% → 100%
🧮Fiery Wrath/Flinch 20% → 40%
🧮Fire Fang🔥10% → 20%
🧮Fire Fang/Flinch 10% → 20%
🧮Flame Wheel🔥10% → 20%
🧮Flare Blitz🔥10% → 20%
🧮Force Palm⚡30% → 60%
🧮Freeze-Dry❄️10% → 20%
🧮Freeze Shock⚡30% → 60%
🧮Freezing Glare❄️10% → 20%
🧮Gunk Shot💀30% → 60%
🧮Hurricane🐤30% → 60%
🧮Hyper Fang/Flinch 10% → 20%
🧮Ice Burn🔥30% → 60%
🧮Ice Fang/Flinch 10% → 20%
🧮Ice Fang❄️10% → 20%
🧮Icicle Crash/Flinch 30% → 60%
🧮Infernal Parade🔥30% → 60%
🧮Lava Plume🔥30% → 60%
🧮Leaf Tornado/Accuracy↓ 50% → 100%
🧮Lick⚡30% → 60%
🧮Liquidation/Def↓ 20% → 40%
🧮Luster Purge/Sp. Def↓ 50% → 100%
🧮Metal Claw/Atk↑ 10% → 20%
🧮Mirror Shot/Accuracy↓ 30% → 60%
🧮Mist Ball/Sp. Atk↓ 50% → 100%
🧮Mountain Gale/Flinch 30% → 60%
🧮Mud Bomb/Accuracy↓ 30% → 60%
🧮Muddy Water/Accuracy↓ 30% → 60%
🧮Needle Arm/Flinch 30% → 60%
🧮Night Daze/Accuracy↓ 40% → 80%
🧮Octazooka/Accuracy↓ 50% → 100%
🧮Poison Fang💀💀 50% → 100%
🧮Poison Sting💀30% → 60%
🧮Powder Snow❄️10% → 20%
🧮Pyro Ball🔥10% → 20%
🧮Razor Shell/Def↓ 50% → 100%
🧮Rolling Kick/Flinch 30% → 60%
🧮Sacred Fire🔥50% → 100%
🧮Sandsear Storm🔥20% → 40%
🧮Scald🔥30% → 60%
🧮Scorching Sands🔥30% → 60%
🧮Searing Shot🔥30% → 60%
🧮Shadow Bone/Def↓ 20% → 40%
🧮Shell Side Arm💀 20% → 40%
🧮Sludge💀10% → 20%
🧮Sludge Bomb💀10% → 20%
🧮Sludge Wave💀10% → 20%
🧮Smog💀40% → 80%
🧮Spark⚡30% → 60%
🧮Springtide Storm/Atk↓ 30% → 60%
🧮Steam Eruption🔥30% → 60%
🧮Steamroller/Flinch 30% → 60%
🧮Stomp/Flinch 30% → 60%
🧮Strange Steam🐤10% → 20%
🧮Thunder Fang/Flinch 10% → 20%
🧮Thunder Fang⚡10% → 20%
🧮Thunder Shock⚡10% → 20%
🧮Triple Arrows/Def↓ 50% → 100%
🧮Triple Arrows/Flinch 30% → 60%
🧮Twineedle💀20% → 40%
🧮Waterfall/Flinch 20% → 40%
🧮Wildbolt Storm⚡20% → 40%
🧮Volt Tackle⚡10% → 20%
🧮Zing Zap/Flinch 30% → 60%
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~Bulbapedia