She noticed the pony for the first time when she was young, not long after she'd received her cutie mark. He became her oldest friend.

Ten years after Celestia disappeared, Dash is accidentally transported to a strange world – and in her race to escape the System, she faces an enemy she never expected.

As Hearth's Warming nears, Applejack celebrates in her own private way.

Her oldest friend tries to save her, but they both discover it's too late.

Ten years ago, Celestia disappeared with no warning nor trace. When Twilight receives a message from the lost princess, calling for help, she and Rainbow Dash speed to Canterlot, where Rainbow Dash is accidentally transported to a strange world – but in

She noticed the pony for the first time when she was young, not long after she'd received her cutie mark. He became her oldest friend.

No matter where you go, there you are.