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>Gains a Rock-type Sandstorm form
>When it changes forms, now gains +30 in Att, SpAtt and Speed (70>100)
>Forecast now forces all weather used by any Pokemon in play to last an extra 3 turns (auto weather rock) AND Forecast makes it so that any weather will stay in effect for as long as Castform is in play (the remaining turns still count down in the background but the weather remains active as long as Castform is on the field, only disappearing once Castform leaves and all weather turns have been exhausted)
Now is it usable?