The clouds are minor characters in Fresh Beat Band of Spies.
The clouds are anthropomorphic characters in the "Angry Fruit Racers" arcade game. Unlike other characters in the game, they are not a kind of fruit. When Savage Strawberry throws a fruit into the clouds, they have the ability to make that kind of fruit rain down on the virtual world. They can also "zap" real-life players into the game whenever Savage Strawberry wants them to.
Most of the time, the clouds are entirely white. They all have two eyes and a mouth. However, when Savage Strawberry throws a fruit into them, the clouds turn a dark gray color. This color change is temporary.
The clouds appear in one episode of Fresh Beat Band of Spies, "Fruit Racer Game."