Is Castform Good in Ruby & Sapphire Playthrough?
Gift from the Weather Institute after the Team Aqua/Magma encounter. AbilityForecast changes type based on weather: Fire in sun, Water in rain, Ice in hail. The concept is unique but Castform's base stats are too low to capitalize. A weather gimmick on a body that can't back it up.
Castform resists most of Roxanne's coverage and hits back hard.
Castform has the type edge here and should clean up Brawly's team.
Castform has the type edge here and should clean up Wattson's team.
Castform has the type edge here and should clean up Flannery's team.
Norman's team hits Castform's weaknesses hard.
Castform has the type edge here and should clean up Winona's team.
Tate & Liza's typing presses Castform's defenses.
Castform has the type edge here and should clean up Wallace's team.
Castform trades roughly evenly with Sidney's team.
Castform trades roughly evenly with Phoebe's team.
Castform has the type edge here and should clean up Glacia's team.
Castform has the type edge here and should clean up Drake's team.
Castform trades roughly evenly with Steven's team.
Gift
Castform is given to you as a gift on Route 119 at Lv 25. Defeat Team Magma/Aqua. Given by a researcher at the Weather Institute on Route 119 after defeating Team Magma (Ruby) or Team Aqua (Sapphire).
Recommended Moves
- After Brawly
- TM35FireFlamethrowerPower 95Accuracy 100%PP 15Mauville Game Corner
- TM13IceIce BeamPower 95Accuracy 100%PP 10Abandoned Ship
- TM24ElectricThunderboltPower 95Accuracy 100%PP 15Mauville Game Corner
- After Wattson
- TM43NormalSecret PowerPower 105Accuracy 100%PP 20Route 111
- TM10NormalHidden PowerPower 90Accuracy 100%PP 15Fortree City
- After Norman
- TM42NormalFacadePower 105Accuracy 100%PP 20Prize for defeating Norman
- TM38FireFire BlastPower 120Accuracy 85%PP 5Lilycove Department Store
- TM22GrassSolar BeamPower 120Accuracy 100%PP 10Safari Zone
How to Get Castform in Ruby & Sapphire
Beat back Team Magma and Aqua at the Weather Institute and a scientist hands you a Castform at level 25. It's a one-time gift tied to that story fight, with no wild version anywhere.
Wild Castform may be holding when caught:
Mystic Water (always) A hold item that raises the power of WATER-type moves.1 location to catch Castform
Badge 6How to Get Castform in Ruby & Sapphire
How to Get Shiny Castform in Ruby & Sapphire
Castform is handed over by a scientist on Route 119, so save beforehand and soft reset the gift until it comes out shiny. Compare Shiny Castform odds across every game
Shiny Castform Evolution
Does Not EvolveRuby & Sapphire Shiny Castform Calculator
2 MethodsBoth methods here share the same odds, about 1 in 8,192 on each try. Pick whichever fits how you play.
Soft Reset: Save in front of a static, gift, or legendary encounter, then reset until it sparkles.
Breeding: Hatch eggs of this line; each egg rolls at the base shiny rate (no Masuda before Gen IV).
How many you have done, or plan to do.
| Chance | Encounters | Time |
|---|---|---|
| 10%lucky few | 864-- | -- |
| 25%one in four | 2,357-- | -- |
| 50%coin flip | 5,678-- | -- |
| 90%very likely | 18,862-- | -- |
Time assumes -- at your pace and does not change your shiny odds.
How is this calculated?
Every encounter has the same shiny chance, the Shiny Odds Per Try shown above. Each one is a separate roll that does not care how many you have already done, so the more you hunt, the higher your overall chance of at least one shiny. The formula below turns your odds and your number of tries into that combined chance.
chance after N tries = 1 − (1 − p)^N, where p = 1 / odds per try
Example at 1 in 8,192 (classic full odds): about 864 encounters for a 10 percent chance, 5,678 for 50 percent, and 18,862 for 90 percent.
The table above flips that around: it shows how many encounters it takes to reach a 10, 25, 50, and 90 percent chance at your current odds. Turning on boosts like the Shiny Charm, sandwiches, or chains improves your odds, so the encounter numbers drop.
These are estimates, not promises. Most games have no pity counter, meaning no guaranteed shiny no matter how many you hunt, so even Very Likely is not guaranteed: some hunters find one early, others go well past that point.
Curious how fast a hunt could go? Work out your Ruby & Sapphire shiny odds for Castform.
Castform Weakness
Castform's Normal typing leaves it vulnerable to Fighting. It shrugs off Ghost-type attacks completely. Only 1 weakness makes it relatively easy to build around defensively.
| Damage | Types |
|---|---|
| 2x (Weak) | Fighting |
| 0x (Immune) | Ghost |
- Dark and Steel types added — Fairy does not exist yet
- Moves are Physical or Special based on type, not per move
What is Castform Weak Against
Good
Castform Evolutions
No evolution chain to worry about here. Castform is a standalone Pokemon with a decent partner pool for breeding through two egg groups. Its eggs take an average time to hatch. View every chain in the Evolution Chart.
How to Evolve
Breeding
Breed Castform easily with 22 breeding partners from the Amorphous and Fairy egg groups. Pass egg moves like Future Sight, Psych Up to offspring.
RS Castform Best Moveset
Type and form shift with each weather condition through AbilityForecast, becoming Water in rain, Fire in sun, Ice in hail. MoveWeather Ball doubles in power and matches the new type. 70 base stats everywhere. The concept can't support any weather role competitively. Held ItemLeftovers sustains.
Best Build
Castform best EVs are Sp. Atk and Speed
Special Attacker Moveset
- Weather Ball
- Rain Dance
- Thunder
- Thunder Wave
Recommended Teammates
Moves List
Without TMs, Castform's movepool is bare bones. With them, you get coverage across 8 types on top of Facade and Secret Power for STAB. The natural kit handles basics, but TMs are doing the real work.
How to Read the Moves Table
Tabs
- Level-Up
- Learned by leveling up.
- TM
- Taught by a Technical Machine.
- Egg
- Inherited via breeding.
- Tutor
- NPC tutor (cost: items, BP, money).
- Reminder
- An NPC reteaches any move this Pokemon could have learned by leveling up.
- Transfer
- Carried over from an older game using Pokemon HOME.
- Event
- Given out through Mystery Gift events.
Visual Signals
CAT (Category)
How the move deals damage and which stats it uses.
A small dot on the icon's corner marks the move as contact. That triggers abilities like Static, Flame Body, Rough Skin, or Iron Barbs, plus items like Rocky Helmet and Sticky Barb.
Tier (S to D)
Each move's competitive rank in RankedBoost's system. TM, Egg, and Tutor sort by tier by default (best first). On Level-Up, click the Tier header to do the same.
PWR (Power)
Base damage. Numbers shown in a type color include STAB (base × 1.5). Hover any colored number to see the math.
— means no power (status moves) or variable power.
Sorting & Filter
Click any column header to sort. Level-Up opens with Lv 1 at the top. TM, Egg, and Tutor open with the highest-tier moves at the top.
Search filters by move name or type. The Filter button limits the list to STAB, Physical, Special, or Status moves.
Level-Up Moves
TM Moves
All 26 TMs are obtainable before the Elite Four
Egg Moves
Tutor Moves
Base Stats
CASTFORM’s appearance changes with the weather. This POKéMON gained the ability to use the vast power of nature to protect its tiny body.
CASTFORM borrows the power of nature to transform itself into the guises of the sun, rain clouds, and snow clouds. This POKéMON’s feelings change with the weather.
Castform Ruby & Sapphire Guide
Castform is given to you at the Weather Institute in Hoenn Route 119 in Pokemon Ruby & Sapphire.
Game Availability
Castform first appeared in Ruby & Sapphire and has been available in 13 games across 7 generations. Obtainable through wild encounters in most titles where it appears.
Click a game to view version-specific details
- Gen 1RB
Red & Blue - Gen 1Y
Yellow - Gen 2GS
Gold & Silver - Gen 2C
Crystal - Gen 3RSDebut
Ruby & Sapphire - Gen 3E
Emerald - Gen 3FRLG
FireRed & LeafGreen - Gen 4DP
Diamond & Pearl - Gen 4Pt
Platinum - Gen 4HGSS
HeartGold & SoulSilver - Gen 5BW
Black & White - Gen 5B2W2
Black 2 & White 2 - Gen 6XY
X & Y - Gen 6ORAS
Omega Ruby & Alpha Sapphire - Gen 7SM
Sun & Moon - Gen 7USUM
Ultra Sun & Ultra Moon - Gen 7Let's Go
Let's Go Pikachu & Eevee - Gen 8SwSh
Sword & Shield - Gen 8BDSP
Brilliant Diamond & Shining Pearl - Gen 8PLA
Legends: Arceus - Gen 9SV
Scarlet & Violet - Gen 9LZA
Legends: Z-A - Gen 10WW
Winds & Waves
Explore
Where to go next after Castform.
Keep playing · Ruby & SapphireRuby & Sapphire Tier ListThe best Pokemon ranked tier by tierSee Ruby & Sapphire Tier List