This story is a sequel to Ponymon: Latios And The Rainbow Racer
The mane 6 have been captured by the evil Team Rocket. Now it's up to Quilava, the C.M.C., and a Pikachu to save them. What is to become of the mane 6? Who is this Pikachu? Find out in Ponymon: Threats From Another World
I can give you a good guess who is that Pikachu and his name begins with a A.