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>Sandstorm form, Rock type. +1 Def. Grants effect of Weak Armor
>Water form: +1 SpDef and grants the effect of Hydration
>Fire form: +1 Speed, grants Flash Fire effect
>Ice form: +1 Speed, grants Ice Body effect
>Flying form in friendly Tailwind or any Delta Stream, Weather Ball becomes Flying. If Tailwind and proper weather are out at the same time, the Flying form overrides IF IT'S A FRIENDLY TAILWIND. Grants effect of Infiltrator
>all get +1 SpA as well
>Forecast summons weather (random) when Castform enters battle
>if holding a weather rock, that weather is summoned instead of a random one and lasts 8 turns. Sharp Beak or something for Tailwind
ez
balanced by literal 70 stats