Danny Williams is Megan's 8-year-old brother and a rambunctious redhead. He is sometimes fond of jokes, although he usually doesn't do them to hurt someone's feelings. He usually feuds with his little sister Molly. He is also sometimes found leading the charge when a situation calls for reckless action.

He first came to Ponyland when the ponies needed Megan's help to defeat The Smooze.

He's best friends with Spike and Surprise.

He was voiced by Scott Menville, best known for the voice of Robin from Teen Titans and Teen Titans Go!.