A company called Disguise has hopped on the MLP Movie bandwagon with a bunch of costumes of various characters from both the movie and general pony. They have costumes available for both adults and kids, with optional wigs instead for anyone that just wants an easy cosplay piece.
Head on down below the break to check it all out!
My Little Pony Movie Disguise Costume Deluxe
My Little Pony Movie Disguise Classic Costume
My Little Pony Movie Disguise Toddler Costume
My Little Pony Movie Disguise Adult Costume
My Little Pony Movie Disguise Wigs
My Little Pony Movie Disguise Ears
Thanks to David, FROM and everyone else for the heads up!