Quoted By:
>Inside Giant Chasm, from the top it appears that the area is enshrouded in thick fog. Because of the snow that falls, it can also be seen as snow clouds, not just fog. But taking it a step further, both mascot legendary Pokemon show that they can evaporate water, and thus melt ice. So now we have a reference to Kyurem being a part of the trio, the clouds are made of water that was once ice, which was melted!