There is a cartoon in which there are many elves who can control the weather.

If there was only one person who could control the weather, it would be Storm, the American animated version of "The Avengers".

There are many animated versions of "Monkey King" and "Feng Shen Bang" that can control the weather. Lei Zhenzi, Rain Girl, Fengshen, Sea Dragon King's sneeze and so on. Sea Dragon King's sneeze

If you think it is the sun elf in "Teletubbies" who can affect the weather by laughing or crying.