A young pegasus called Rainbow Dash hadn't long moved to Ponyville where her long time friend lives, they decide to move there together. She had made a friend of the town's party pony, Pinkie Pie.

Rainbow Dash was heading home. When she got there on her doorstep was a light brown box taped up with holes poked in it with a letter on it. "That's weird I never ordered anything on it but it could be form Fluttershy or Dad" Rainbow said picking up the box and placing in under her wing, she then opened the door and placed the box down after closing the door. "Time to open this baby up" she said as she opened the box and inside was a cobalt blue colt pegasus. She then opened the letter and read it aloud "Dear Miss Dash, I want you to take after Sonic here, I ask of you to give him the love and care if he was your own and please don't ask anything question" Rainbow said aloud. She then looked towards the blue colt and said "Welcome to the family, Sonic Dash".