Pokémon/Pokédex/Castform

Type Matching
Note: When Castform's type changes due to weather conditions, its type match-up list changes to that of Fire, Water, or Ice-type, respectively.

Extra! Weatherball also changes with Hail, Sunny Day, Raindance, and SANDSTORM!

TM/HM

 * RS/FL: Attract, Blizzard, Dive, Double Team, Facade, Frustration, Hail, Hidden Power, Hyper Beam, Ice Beam, Iron Tail, Protect, Rain Dance, Rest, Return, Safeguard, Secret Power, Surf, Toxic, Water Pulse, Waterfall

Breeding

 * RS/FL: Confuse Ray, Dragonbreath, Hypnosis, Light Screen, Mirror Coat, Mud Sport

Trading Cards

 * EX Hidden Legends #23 - Rain Castform
 * EX Hidden Legends #25 - Snow-cloud Castform
 * EX Hidden Legends #30 - Castform