Partner ideasfor rainy Castform

Water

Pairing ideas, not prescriptions — ideas to test, with every reason traceable. Each card sums up what the partner does for Castform: completing its plan, patching weaknesses, breaking walls — and how often the two already team up in ranked play. Downsides sit under the card, never hidden. Open a card’s Partnership Report for every reason.

What holds up

Every reason is derived from the pinned dataset, never written by hand
Coverage, resistances, and role gaps are calculated per pair
“On X% of teams” is counted from ranked play, not estimated

Still growing

Not exhaustive — partners that work exist beyond what these rules reach
Some pairings are theory or niche rather than something you meet on ladder
The order is a ranking heuristic; the reasons are the evidence, not the rank

Often paired (3)

Pelipper
WaterFlying
On 41% of Castform's ranked teams
Hits Grass super-effectively with HurricaneAdds team-wide guard support Adds weather controlBreaks Grass walls with Hurricane
Both weak to Electric
Swampert
WaterGround
On 23% of Castform's ranked teams
Immune to ElectricHits Grass super-effectively with Ice BeamHits Electric super-effectively with EarthquakeAdds team-wide guard supportBreaks Grass walls with Ice BeamBreaks Dragon walls with Ice Beam
Both weak to Grass
Torkoal
Fire
On 14% of Castform's ranked teams
Resists GrassHits Grass super-effectively with EruptionHits Electric super-effectively with Earth PowerAdds weather controlBreaks Grass walls with Eruption

Defensive glue (21)

Meganium
Grass
Covers its Grass and Electric weaknesses
Hits Grass super-effectively with Pollen PuffHits Electric super-effectively with EarthquakeAdds anti-Trick Room pressure Adds long-game durabilityBreaks Water walls with Leaf StormBreaks Grass walls with Pollen Puff
Goodra
Dragon
Covers its Grass and Electric weaknesses
Hits Grass super-effectively with FlamethrowerHits Electric super-effectively with Stomping TantrumAdds long-game durabilityBreaks Water walls with ThunderboltBreaks Grass walls with Flamethrower
Hydreigon
DarkDragon
Covers its Grass and Electric weaknesses
Hits Grass super-effectively with Heat WaveHits Electric super-effectively with Earth PowerAdds anti-Trick Room pressureBreaks Grass walls with Heat WaveBreaks Dragon walls with Draco Meteor
Hydrapple
GrassDragon
Covers its Grass and Electric weaknesses
Hits Grass super-effectively with Pollen PuffHits Electric super-effectively with Earth PowerAdds long-game durabilityBreaks Water walls with Leaf StormBreaks Grass walls with Pollen Puff
Abomasnow
GrassIce
Covers its Grass and Electric weaknesses
Hits Grass super-effectively with BlizzardHits Electric super-effectively with Earth PowerAdds weather controlBreaks Water walls with Wood HammerBreaks Grass walls with Blizzard
Venusaur
GrassPoison
Covers its Grass and Electric weaknesses
Hits Grass super-effectively with Sludge BombHits Electric super-effectively with Earth PowerBreaks Water walls with Leaf StormBreaks Grass walls with Sludge Bomb
Sceptile
Grass
Hits Electric super-effectively with Earth Power
Resists GrassLightning Rod redirects single-target Electric attacks away from Castform while both are activeAdds team-wide guard supportBreaks Water walls with Leaf StormBreaks Dragon walls with Dragon Pulse
Scovillain
GrassFire
Covers its Grass and Electric weaknesses
Hits Grass super-effectively with OverheatHits Electric super-effectively with Stomping TantrumBreaks Water walls with Leaf StormBreaks Grass walls with Overheat
Emolga
ElectricFlying
Covers its Grass and Electric weaknesses
Hits Grass super-effectively with Air SlashAdds anti-Trick Room pressureBreaks Water walls with DischargeBreaks Grass walls with Air Slash
Stunfisk
GroundElectric
Castform resists its Surf
Immune to ElectricHits Grass super-effectively with Sludge WaveHits Electric super-effectively with EarthquakeBreaks Water walls with ThunderBreaks Grass walls with Sludge Wave
Both weak to Grass
hisuian Decidueye
GrassFighting
Covers its Grass and Electric weaknesses
Hits Grass super-effectively with Brave BirdAdds anti-Trick Room pressureBreaks Water walls with Leaf BladeBreaks Grass walls with Brave Bird
Drampa
NormalDragon
Covers its Grass and Electric weaknesses
Hits Electric super-effectively with Earth PowerAdds weather controlBreaks Water walls with ThunderboltBreaks Dragon walls with Draco Meteor
Victreebel
GrassPoison
Covers its Grass and Electric weaknesses
Hits Grass super-effectively with Sludge WaveAdds anti-Trick Room pressureBreaks Water walls with Leaf StormBreaks Grass walls with Sludge Wave
galarian Stunfisk
GroundSteel
Castform resists its Surf
Immune to ElectricHits Grass super-effectively with Sludge WaveHits Electric super-effectively with EarthquakeBreaks Grass walls with Sludge Wave
Aggron
SteelRock
Castform resists its Surf
Hits Grass super-effectively with BlizzardHits Electric super-effectively with EarthquakeAdds anti-Trick Room pressureBreaks Water walls with ThunderBreaks Grass walls with Blizzard
Vileplume
GrassPoison
Covers its Grass and Electric weaknesses
Hits Grass super-effectively with Sludge BombBreaks Water walls with Leaf StormBreaks Grass walls with Sludge Bomb
Heat Rotom
ElectricFire
Covers its Grass and Electric weaknesses
Hits Grass super-effectively with OverheatBreaks Water walls with ThunderboltBreaks Grass walls with Overheat
hisuian Goodra
SteelDragon
Covers its Grass and Electric weaknesses
Adds long-game durabilityBreaks Water walls with ThunderboltBreaks Dragon walls with Draco Meteor
Dragalge
PoisonDragon
Covers its Grass and Electric weaknesses
Hits Grass super-effectively with Sludge WaveBreaks Grass walls with Sludge WaveBreaks Dragon walls with Draco Meteor
Pikachu
Electric
Castform resists its Surf
Lightning Rod redirects single-target Electric attacks away from Castform while both are active Adds anti-Trick Room pressureBreaks Water walls with Volt TackleBreaks Dragon walls with Alluring Voice
Leafeon
Grass
Covers its Grass and Electric weaknesses
Hits Grass super-effectively with X-ScissorBreaks Water walls with Leaf BladeBreaks Grass walls with X-Scissor