After chasing Pinkie around town for coloring his mane, Sombra decides to take a nap to rest from his extreme pursuit. But, when he hasn't awoken for his afternoon walk with Pinkie, who is his assigned reformer, she decides to poke some fun at him while he's sleeping.
Meaning, she decides to take his armor and cape, then pretend to be him.
Pinkie decides to prank Sombra and things get way out of hoof.
Sequel to "April Fools!" Fluttershy is roped into pranking Sombra with Pinkie's encouragement and things get extremely out of hoof.
Sequel to "Pink Is Your Color". There's nothing wrong with imitating someone you like... Right?