For a while, I've been thinking they should put some stallions in the main cast. I don't really want them to outshine the girls, but I would like them to be an important part of the show and great friends to the Mane 6. And let's face it, Spike has been hanging out with the girls too much.
I kept the names, looks, and talents of the stallions, but I also have different versions to their backstories. So I have selected these backstories and hope you will enjoy them.
Sir Sheath: A green-coated, yellow-maned earth pony with a sword for a cutie mark. A kind, brave, and strong pony, and a descendant of the "Steed Knight of the Chess Table," Sir Checkmate. Sheath's father, Vopal, before he passed away, taught him everything he knows about Checkmate in weaponry, strategy, and hoof-to-hoof combat . These skills and knowledge has been passed down from generation to generation. Now he is dubbed by Princess Celestia as the new "Steed Knight of the Chess Table." His favorite game is chess and his favorite contact sport is jousting. I have chosen him to be Twilight Sparkle's love interest. Sir Sheath is like Twilight's "missing half."
Nimbus Quasar: A black-coated, red-maned pegasus with vector arrows for a cutie mark. He is a performing artist who is skilled in dancing, gymnastics, parkour, and acrobatics. He seems negative and a bit of a downer most of the time, but I can be a good source of wisdom. He delivers minor insults and sassy comebacks whenever a pony is being obnoxious; like when Rarity is being too uptight, or when Rainbow Dash is being egotistic, or when Spike is being too silly.
Bright Idea: A blue-coated, light green-maned unicorn with a light bulb for a cutie mark. A silly, but brillant inventor who can create any wacky thing that pops into his head. He hopes that his crazy inventions will be part of the next century. Bright Idea and Nimbus Quasar have been best friends since them were colts. He also has a crush on Pinkie Pie.
Nova: A black-maned unicorn with a brick red coat and a Equestrian symbol for Black Magic for a cutie mark. I suggest him to be the show's new main antagonist. Nova is a bumbling master criminal who uses his gift of magic to commit multiple crime throughout Equestria. He is also a practitioner of Black Magic. Different than regular magic in so many ways, some of which are most mischievous. Nova can cast it whenever he wants, but his usage for it is limited. He could only perform Black Magic a few times a day. So he only uses it when he most needs it. He doesn't like it when his schemes are foiled. When he cross pathes with the main characters and starts trouble, he becomes their arch nemesis and both Sheath and Twilight's equal. They get a shock when they find out he's dating "the Great and Powerful" Trixie.
Little Valor: A teal-colored, brown- haired earth pony colt with a shield for a cutie mark. Sir Sheath's Steed Knight apprentice and a good friend to Pipsqueak and the Cutie Mark Crusaders. Silver Spoon has a crush on him, even though Diamond Tiara doesn't like him.
If these won't suit you, I have other versions about their backstories.
If you want to see what they would look like, enter these codes into "Advenced" on the Pony Creator:
Sir Sheath: 33270W70006FFE00FFC49D00000D4FE00UN1837400000000D0D4FE00FF7FFF21107F3FCC004CB2
Nimbus Quasar: 333G0960200000007F7F7F11400005900QM183710402100140FE0000FF7FFF12107F3FCC004CB2
Bright Idea: 2X240A21000008FE14E27102400DA9100SL1837002110001S193FE40FFFFFE1O107F3FCC004CB2
Little Valor: 1B2807700000A09EFFC49D000004F3214UN1837000030003004F3214FF7FFF2W107F3FCC004CB2