The Case For A Sandy Castform

gamerant.com:

Over the years, the Pokemon games have introduced an extensive number of creatures that could hit the thousand mark with the upcoming Pokemon Scarlet and Violet. Many of these Pokemon have been given further variety with several forms, ranging from the all too familiar regional variants first introduced in Pokemon Sun and Moon to much rarer visual distinctions like Sinistea's and Polteageist's phony and antique forms from Pokemon Sword and Shield.

One such Pokemon that arguably began the trend of multi-form creatures across future Pokemon games was Castform, the Weather Pokemon. Thanks to its unique «Forecast» ability, Castform would transform dependent on the weather in battle and take on a new type, receiving Sunny, Rainy, and Snowy forms respectively. But while the sandstorm effect existed at the time when Castform was introduced in Pokemon Ruby and Sapphire, Castform never received a Sandy form despite the ideal opportunity to round out all forms of weather. Since the weather continues to be a core mechanic in Pokemon, Game Freak should revisit this unique Pokemon and complete the Castform set.

Pokemon Who Deserve Regional Forms in Pokemon Scarlet and Violet

The most significant evidence that Game Freak has acknowledged sandstorm as an important weather effect like rain or hail lies with the move Weather Ball. When Castform was introduced, Weather Ball was its signature move, and would not only change type alongside Castform with the weather, but would also double in power. This provided Castform with several weather-based forms and a unique gimmick that made it worthwhile addition to a team. For instance, during hail, Castform and Weather Ball would become Ice-types, and if Castform knew other weather-changing moves