Pikachu and his friends have gathered to listen to a song performed by Meloetta at the melody tree. Meloetta is soon interrupted by a Sandstorm attack which breaks the tree and causes the Melody Berries to scatter. Before the performance can continue the Pokémon must retrieve the lost berries.

For hundreds of years, holiday genies have united to bring Christmas magic to the children of the world. However, this year a selfish ex-genie is determined to become the all-powerful Christmas Genie by stealing all the magic for himself. Now, it is up to a smart but reclusive elf to stop his evil plan and save Christmas for everyone.