Base Stats
Abilities
Type Matchups
View full type chart →Damage multipliers vs. water typing. Ability-based immunities (e.g. Levitate) are not included.
Forms · 4 variations
Battle & Lore Hub
Battle Strategy
Castform-Rainy serves as a weather-dependent special attacker that relies on the 50% damage boost to Water-type moves. It should be used as a mid-tier rain abuser that takes advantage of perfectly accurate Thunders and Hurricane to pressure the opponent.
Best Used In
Low-tier formats like ZU (Zero Used) or PU in older generations, specifically on dedicated Rain teams where it can abuse accurate secondary coverage.
Strengths
- ›Perfectly accurate Thunders and Hurricanes in rain
- ›STAB-boosted Weather Ball becomes a 100 BP Water move
- ›Versatile movepool covering various elemental types
- ›50% Special Defense boost under Rain in some side games
Weaknesses
- ›Extremely mediocre base 70 stats across the board
- ›Completely reliant on weather to maintain its form and power
- ›Vulnerable to common Electric and Grass-type coverage
- ›Outclassed by faster or harder-hitting Swift Swim users
Competitive Tips
- ›Equip Mystic Water or Life Orb to compensate for its low base 70 Special Attack.
- ›Always run Weather Ball, as it serves as a more reliable 150 power STAB move than Hydro Pump in rain.
- ›Use Thunder to check bulky Water-types and Hurricane for Grass-type switch-ins.
- ›Utilize U-turn to pivot out if a Tyranitar or Abomasnow switches in to change the weather.
Recommended Teammates
Pelipper
Provides Drizzle to instantly trigger Castform's transformation without wasting a turn.
Ferrothorn
Resists the Electric and Grass moves that threaten Castform and thrives in rain.
Barraskewda
Acts as a physical wallbreaker that benefits from the same rain support.
Raichu
Provides Lightning Rod support to negate Castform's Electric-type weakness in Doubles.
Scizor
Its Fire-type weakness is mitigated by the rain, and it provides slow U-turn support.
Game History
Introduced in Generation III as a gift Pokémon from the Weather Institute in Hoenn to showcase the new weather mechanics. While it has never been a top-tier competitive threat, it remains a unique technical marvel for its Forecast ability and signature move, Weather Ball.
Trivia
- ◆Its body is composed of cells identical to water molecules.
- ◆In the anime, it was featured at the Weather Institute under the care of Professor Bart.
- ◆While its form changes, its base stats remain 70 across the board regardless of the weather.
- ◆Its appearance is based on a teru teru bōzu, a Japanese doll used to pray for good or bad weather.
- ◆In Pokémon Go, Castform-Rainy is the only form that can be Shiny as a wild encounter separate from its base form.
- ◆Its head shape changes slightly to resemble a water droplet when it transforms into this state.
Moves · 72 total
Level-Up
5 movesTM / HM
16 movesEgg Moves
5 movesMove Tutor
9 movesOther
37 movesWhere to find· 22 games
Ruby
1 spot- •Hoenn Route 119 Weather Institute
Sapphire
1 spot- •Hoenn Route 119 Weather Institute
Emerald
1 spot- •Hoenn Route 119 Weather Institute
FireRed
PokédexIn this game's Pokédex — wild location data unavailable.
LeafGreen
PokédexIn this game's Pokédex — wild location data unavailable.
Diamond
1 spot- •Trophy Garden
Pearl
1 spot- •Trophy Garden
Platinum
1 spot- •Trophy Garden
HeartGold
PokédexIn this game's Pokédex — wild location data unavailable.
SoulSilver
PokédexIn this game's Pokédex — wild location data unavailable.
Black
PokédexIn this game's Pokédex — wild location data unavailable.
White
PokédexIn this game's Pokédex — wild location data unavailable.
Black 2
1 spotWhite 2
1 spotX
PokédexIn this game's Pokédex — wild location data unavailable.
Y
PokédexIn this game's Pokédex — wild location data unavailable.
Omega Ruby
1 spot- •Hoenn Route 119 Weather Institute
Alpha Sapphire
1 spot- •Hoenn Route 119 Weather Institute
Sun
10 spots- •Alola Route 17 Northeast
- •Alola Route 17 West
- •Exeggutor Island
- •Haina Desert
- •Lush Jungle North
- •Lush Jungle South
- •Lush Jungle West
- •Malie Garden
- •Mount Lanakila Outside
- •Tapu Village
Moon
10 spots- •Alola Route 17 Northeast
- •Alola Route 17 West
- •Exeggutor Island
- •Haina Desert
- •Lush Jungle North
- •Lush Jungle South
- •Lush Jungle West
- •Malie Garden
- •Mount Lanakila Outside
- •Tapu Village
Ultra Sun
11 spots- •Alola Route 17 Northeast
- •Alola Route 17 West
- •Exeggutor Island
- •Haina Desert
- •Lush Jungle North
- •Lush Jungle South
- •Lush Jungle West
- •Malie Garden
- •Mount Lanakila Base
- •Mount Lanakila Outside
- •Tapu Village
Ultra Moon
11 spots- •Alola Route 17 Northeast
- •Alola Route 17 West
- •Exeggutor Island
- •Haina Desert
- •Lush Jungle North
- •Lush Jungle South
- •Lush Jungle West
- •Malie Garden
- •Mount Lanakila Base
- •Mount Lanakila Outside
- •Tapu Village