My Little Pony: Friendship is Magic Colt Version is a male version of My Little Pony: Friendship is Magic. Fans usually change the pitch or dub scenes from the show in a more male voice. There are many videos of such.
It was started by a deviantart user by the name of Trotsworth, who often vectored ponies and decided to do a bit of genderbending. Not only has he genderbent the mane cast, but he has also genderbent Spike and Celestia.
The mane six charicters also look different and have different names.
Twilight Sparkle = Dusk Shine
Fluttershy = Butterscotch
Rarity = Elusive
Applejack = Applejack
Rainbow Dash = Rainbow Blitz
Pinkie Pie = Bubble Berry
Spike = Barbara
Celestia = Lord Solaris
Big Macintosh = Macareina
Luna = Prince Artemis
Discord = Eris
Queen Chrysalis = King Metamorphosis
Princess Cadence = Prince Crescendo
Shining Armour = Gleaming Shield