Normal:
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Rain:
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Hail:
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Sun:
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Castform, the Weather Pokémon. Castform is able to transform its appearance depending on the weather. It uses the power of nature to transform in order to protect its small body.
– Ash’s Pokedex
These should really be alternated according to weather ha!
Come to think of it, Water types are one of usable typings in Pokèmon to use. They can learn ice beam to counter grass types and some can learn ground type moves to counter electric types. Overall, I think they are great combination with fire or grass types.