Twilight and Spike were walking in Ponyville with Fluttershy and Rainbow Dash, until Queen Chrysalis shows up looking corrupted. Soon she had everypony in cages. Just then a green portal opened up and three vehicles drove out it. A yellow car stopped right in front of Twilight, Spike, Rainbow and Fluttershy, with a human Sunset Shimmer in the drive seat. They drove back through the portal and on the other side they were greeted by a giant red and blue robot named Optimus Prime. He then explains that an evil Ultraman has been make friends with villains from other worlds with his kaiser blood cursing them. Now The three ponies and dragon must work with heroes from other worlds.
Super Mario
Sonic the Hedgehog
Freddy Fazbear
Rayman
Flain
Spyro the Dragon
Sunset and the Dazzlings
Godzilla
Gomora
Ultraman
Optimus Prime