Monotype Water.

Gyarados (M) @ Gyaradosite
Ability: Intimidate
EVs: 240 HP / 108 Def / 160 Spe
Impish Nature
- Dragon Dance
- Waterfall
- Rest
- Sleep Talk

Greninja (M) @ Life Orb
Ability: Protean
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
IVs: 29 HP / 30 Atk / 30 SpA / 30 Spe
- Ice Beam
- Extrasensory
- Hidden Power [Fire]
- Dark Pulse

Azumarill (M) @ Choice Band
Ability: Sap Sipper
EVs: 248 HP / 252 Atk / 8 Spe
Adamant Nature
- Play Rough
- Waterfall
- Aqua Jet
- Knock Off

Swampert (M) @ Leftovers
Ability: Torrent
EVs: 252 HP / 4 Atk / 252 Def
Relaxed Nature
- Stealth Rock
- Scald
- Earthquake
- Roar

Keldeo @ Leftovers
Ability: Justified
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
- Substitute
- Scald
- Calm Mind
- Secret Sword

Rotom-Wash @ Leftovers
Ability: Levitate
Shiny: Yes
EVs: 252 HP / 252 SpD / 4 Spe
Calm Nature
- Hydro Pump
- Volt Switch
- Pain Split
- Will-O-Wisp