What is a good moveset for Gyarados?

Question

Share your best competitive movesets for Gyarados on this thread! Movesets for Mega Gyarados can also be posted here, as well as for Magikarp.

Check the submission guidelines before posting! Only competitive movesets with all relevant details (item, nature, exact EVs, ability, moves) and a solid explanation will be accepted.

Gyarados Pokédex and learnset for reference.

Answer 1

Dancer Gyarados
Ability: Intimidate -----------> Mold Breaker (Mega)
EVs: 252 Attack 252 Speed 4 Sp Defense
Item Gyaradosite
Nature: Jolly (+Speed -Sp Attack)

Moveset-
Dragon Dance -For Boost
Waterfall/ Aqua Tail -Stab+Flinch/ Stab
Ice Fang -Coverage to Dragon, Flying, Grass, Ground(Water can also deal Ground)
Earthquake -MOST IMPORTANT! Electric type coverage

You can also us Moxie Gyarados. But I use Intimidate as it reduces opponent's Attack giving it chance to survive Physical attackers. I chose Mega because it has Mold Breaker ability which neutralizes Electric types with Levitate ability like Eelektross and Rotom.

Answer 2

Rest Gyarados

Gyarados @ Chesto Berry
Ability: Moxie
EVs: 4 HP / 252 Atk / 252 Spe or 252 HP / 4 Atk / 252 Spe
Adamant Nature
- Waterfall
- Earthquake
- Dragon Dance
- Rest

Set up Dragon dance then begin the sweep; moxie helps maintain the sweep whilst rest gets rids of status conditions and heals your gyarados.

Answer 3

Gyarados (M) @ Choice Scarf
Ability: Moxie
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
IVs: 0 SpA
- Waterfall
- Earthquake
- Ice Fang / Stone Edge
- Dragon Dance
Analysis
Waterfall is your STAB and Gyarados' best Water type move.
Earthquake deals with the Electric types that you're weak to. Also deals with the Rock types but Waterfall covers that.
Ice Fang and Stone Edge are both coverage. Ice Fang deals with Grass, Flying and Dragon while Stone Edge deals with Ice, Flying and Bug.
Dragon Dance is your set up move. A boost in Attack and Speed is nice and it'll help you sweep.

Sweeper EVs.

Comments

Dragon Dance with Choice Scarf? You're locked into it, and switching gets rid of your stat boosts.

Answer 4

Gyaradoes (M) @ Mystic Water
Ability: Moxie
EVs: 252 Atk / 250 SpA / 8 Spe or 8 HP / 252 Atk / 252 SpA
Adamant Nature
- Crunch
- Aqua Tail
- Ice Fang
- Earthquake

• Crunch: power STAB
• Aqua Tail: type move STAB
• Ice Fang: coverage
• Earthquake: coverage

Comments

.....You have no special attacks, yet you're investing in special attack. You're running 250, not 252. You're utilizing adamant, and investing in 250 SpAtk. You're utilizing mystic water, which....is horrible.