Actually, Weather Ball does change into a Rock type during Sandstorm and get increased power. However, it IS true that Castform doesn't get a Rock form and thus doesn't get STAB like it would during Sunny Day, Rain Dance or Hail. Which is honestly unfair.
I personally wouldn't mind if we house-ruled in a rock form for Castform, since his stats don't change in any of his forms... well, not directly. He would get a bonus to Special Defense as a result of rock types getting the benefit of sandstorm. However, Sandstorm does lack some of the benefits such as Sunny Day boost or Rain Dance boost that his Castform form would have gotten from his attack being fire or water type. So it's basically trading off an offensive boost that his fire or water form would have for a defensive boost that a Rock type form could offer.
Last edited by Menarker; 10-17-2010 at 09:38 PM.
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