Mysterious portals begin appearing in different locations in Equestria, allowing giant monsters from another world to enter and roam the land. Including the King of the Monsters: Godzilla.
Shining Armor, Princess Cadence, and Prince Blueblood are childhood friends with Blueblood and Shining Armor pining after Princess Cadence. Years later after Princess Cadence come back from Princess training, they are still in love with her. As they