Discord accidentally transports Fluttershy and Angel to the Pokémon universe, where they turn into human and Pokémon. A rookie trainer finds a pink-haired girl with a Buneary lost in the Ilex Forest. He soon decides to help her find her way home.
Pegasi have been pushing clouds around the sky and breaking them up for years and they never really worried about where the clouds went, or who it would anger. They also weren't prepared for war.