Pikachu, Kore Nan no Kagi? (Sub)
Full movieThe Key Pokémon Cleffy appears before Pikachu and friends!
When keys that possess mysterious powers are inserted into the keyholes floating in mid-air, the keyholes light up and expand and a magical subspace spreads out before the Pokémon!
Cleffy has keys that lead to all kinds of worlds. What kind of world does the key Pikachu receives take the Pokémon to?