Ruby
 CASTFORM’s appearance changes with the weather. This POKéMON gained the ability to use the vast power of nature to protect its tiny body.
 Sapphire
 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.
 Emerald
 It alters its form depending on the weather. Changes in the climate such as the temperature and humidity appear to affect its cellular structure.
 Fire Red
 It has the ability to change its form into the sun, the rain, or a snow cloud,  depending on the weather.
 Leaf Green
 It has the ability to change its form into the sun, the rain, or a snow cloud,  depending on the weather.
 Diamond
 Its appearance changes with the weather. Recently, its molecules were found to be just like water.
 Pearl
 Its appearance changes with the weather. Recently, its molecules were found to be just like water.
 Platinum
 Its appearance changes with the weather. Recently, its molecules were found to be just like water.
 Heart Gold
 This Pokémon can change its cells, taking different forms based on the temperature and humidity.
 Soul Silver
 This Pokémon can change its cells, taking different forms based on the temperature and humidity.
 Black
 Its appearance changes with the weather. Recently, its molecules were found to be just like water.
 White
 Its appearance changes with the weather. Recently, its molecules were found to be just like water.
 Black 2
 Temperature and weather affect its cellular structure, so this Pokémon changes form according to the weather.
 White 2
 Temperature and weather affect its cellular structure, so this Pokémon changes form according to the weather.
 X
 This Pokémon can change its cells, taking different forms based on the temperature and humidity.
 Y
 It has the ability to change its form into the sun, the rain, or a snow cloud, depending on the weather.
 Omega Ruby
 Castform’s appearance changes with the weather. This Pokémon gained the ability to use the vast power of nature to protect its tiny body.
 Alpha Sapphire
 Castform borrows the power of nature to transform itself into the guises of the sun, rain, and snow-clouds. This Pokémon’s feelings change with the weather.
 Sun
 It changes its form depending on the weather. Changes in the temperature or humidity appear to affect its cellular structure.
 Moon
 Its form changes on its own, due to its cells’ sensitive reactions to temperature and humidity.
 Ultra Sun
 Although its form changes with the weather, that is apparently the result of a chemical reaction and not the result of its own free will.
 Ultra Moon
 Its form changes depending on the weather. The rougher conditions get, the rougher Castform’s disposition!