Princess Celestia gets invaded by GiantDad.

A Thousand Sons warrior from the Warhammer 40k universe ends up in Equestria.

Celestia and Luna are in a cereal advertisement.

A red and Black alicorn travels to Equestria

Princess Celestia must escape Lordran to return home.

A string of murders lead to an investigation

A humam wakes up in an alien world, all he knows is that his name is Alexander Smith, and THERE ARE PONIES EVERYWHERE!