Mega Gyarados
WaterDark
Best attacking moveset: Waterfall and Hydro Pump, worth 15.0 damage per second against a neutral target.
Best moveset
Mega Gyarados can learn 24 combinations. Waterfall with Hydro Pump does the most damage per second of them, at level 40 with a perfect attack stat. Same-type moves get the 1.2× bonus, and the cycle assumes the charged attack fires the moment it has the energy.
Stats and moves come straight from the game's own data files. Every number on this page is a raid and gym number, not a PvP one.
Type matchups
| Fast attack | Type | Power | Duration | Energy |
|---|---|---|---|---|
| Bite | Dark | 6 | 0.5s | +4 |
| Dragon Breath | Dragon | 6 | 0.5s | +4 |
| Waterfall | Water | 13 | 1.0s | +7 |
| Dragon Tail Legacy | Dragon | 14 | 1.0s | +8 |
| Charged attack | Type | Power | Duration | Energy |
|---|---|---|---|---|
| Crunch | Dark | 65 | 3.0s | -33 |
| Hydro Pump | Water | 135 | 3.5s | -100 |
| Outrage | Dragon | 110 | 4.0s | -50 |
| Twister | Dragon | 50 | 3.0s | -33 |
| Aqua Tail Legacy | Water | 50 | 2.0s | -33 |
| Dragon Pulse Legacy | Dragon | 90 | 3.5s | -50 |
Shiny
Shiny availability is tracked for Gyarados as a species, on the Gyarados page.
Other forms
Evolution family
Numbers
| Max CP | 5,332 at level 50, 4,717 at level 40 |
|---|---|
| Raid catch | 2,695 CP at level 20, or 3,369 if weather boosted (perfect IVs) |
| Lowest possible raid catch | 2,597 CP. Raid encounters can't roll below 10/10/10 |
| Base stats | 292 attack · 247 defense · 216 stamina |
What it costs
| Second charged move | 10,000 Stardust and 25 Candy |
|---|---|
| Buddy distance | 1 km per Candy |
| Purify a Shadow one | 1,000 Stardust and 1 Candy |
| Size | 6.5 m and 235 kg |
Best moveset against each type
Mega Gyarados does not have one best moveset, it has 4. Which one wins depends on what you are attacking, because a move only gets its bonus against something weak to it. Best against Ground, Rock, Fire.
| Against | Best moveset | DPS |
|---|---|---|
| Ground | Waterfall + Hydro Pump | 23.5 |
| Rock | Waterfall + Hydro Pump | 23.5 |
| Fire | Waterfall + Hydro Pump | 23.5 |
| Dragon | Dragon Tail + Outrage | 21.4 |
| Ghost | Bite + Crunch | 21.2 |
| Psychic | Bite + Crunch | 21.2 |
| Normal | Waterfall + Hydro Pump | 15.0 |
| Fighting | Waterfall + Hydro Pump | 15.0 |
| Waterfall + Hydro Pump | 15.0 | |
| Poison | Waterfall + Hydro Pump | 15.0 |
| Bug | Waterfall + Hydro Pump | 15.0 |
| Steel | Waterfall + Hydro Pump | 15.0 |
| Electric | Waterfall + Hydro Pump | 15.0 |
| Ice | Waterfall + Hydro Pump | 15.0 |
| Dark | Waterfall + Hydro Pump | 15.0 |
| Fairy | Waterfall + Hydro Pump | 15.0 |
| Water | Bite + Outrage | 13.4 |
| Grass | Bite + Outrage | 13.4 |
Same maths as the headline number, run once per defending type: level 40, perfect attack IV, and the target's own type taken into account. Sorted by damage, so the top of this table is what Mega Gyarados is actually for.
Counters: what beats Mega Gyarados
| Attacker | Type | Moveset | DPS |
|---|---|---|---|
 Regieleki | Electric | Lock On + Thunder Cage Legacy | 26.3 |
 Lucario | FightingSteel | Force Palm + Aura Sphere Legacy | 23.6 |
 Pheromosa | BugFighting | Bug Bite + Focus Blast | 22.9 |
 Kartana | GrassSteel | Fury Cutter + Leaf Blade | 22.7 |
 Zeraora | Electric | Volt Switch + Plasma Fists | 22.6 |
 Zekrom | DragonElectric | Charge Beam + Fusion Bolt Legacy | 22.1 |
 Xurkitree | Electric | Thunder Shock + Discharge | 21.8 |
 Terrakion | RockFighting | Double Kick + Sacred Sword Legacy | 21.5 |
 Blaziken | FireFighting | Counter + Aura Sphere | 21.3 |
 Tapu Koko | ElectricFairy | Volt Switch + Natures Madness Legacy | 20.7 |
Ranked by damage per second against Mega Gyarados's own defense, at level 40 with a 15 attack IV, one per evolution family.