As a baby, Discord was abandoned by his mother and left behind to be raised by another. Princess Celestia and Princess Luna found him and raised him. While Princess Celestia was busy, Luna took care of the Draconequus who began to see her as his mother. Many ponies feared Discord for his strange appearance and magic which he had little control over.

After Luna was banished, Celestia started taking care of the young Draconequus but due to fear of others judging him, he concealed his true form and asked Celestia to make others forget what he was, she reluctantly agreed and now, no one could remember what Discord was.

Years later, a unicorn tells Celestia of the coming return of Nightmare Moon so she sends her and a disguised Discord to Ponyville to make friends. Will they?

This is a possible retelling of MLP Friendship is magic but the Discord in the entire series. This was inspired by Hero by NalaxSimba.
https://www.fimfiction.net/story/284345/hero

This story is a sequel to Hide and Seek with Screwball

This is a prequel to Hide and Seek with Screwball. This is the story of how the Mane 6 met Screwball.

About one year after being freed from his stone prison and fully accepting Friendship in his life. Discord has decided to do the one thing he has been dreading, asking the Princesses for help in finding his daughter, Screwball. Meanwhile, the Mane 6 are called for a Friendship Problem in an area known for its famous chocolate and candy. They go and there seems to be nothing wrong until they dig deeper into the town's dark secret. Will they solve the Friendship Problem and be able to return back home?

I recommend reading My Little Phantom, Friendship is Ghostly by Etrigan the Demon and Phantom Fan 21 if you haven't yet. Fantastic story! https://www.fanfiction.net/s/10370834/1/my-little-phantom-friendship-is-ghostly

Phantom and Twilight are headed to the world of Canterlot High as they retrieve their crowns from Sunset Shimmer and her little sister, Moonrise. With the help of some friendly ghosts and the power of friendship, can they work together with their new friends to stop them or will they lose their crowns to two ponies who want to rule Equestria? Read along to find out.

Starlight has been left alone with Screwball. She thinks that it's going to be easy as pie but will it since Screwball is the daughter of Discord and Starlight doesn't even know about it. How much chaos will Screwball cause? Will Twilight and Fluttershy complete their friendship mission? Read to find out.