Below are listed appearances of words like "someone", "somebody", etc. instead of "somepony". Some episodes might not have been included.
Friendship is Magic, part 1
Fluttershy: Oh my. Um... Stop, please, everyone.
Pinkie Pie: And if you're new, then you haven't met anyone yet and if you haven't met anyone yet, you must not have any friends.
Pinkie Pie: I'll just throw a great, big, ginormous, super duper, spectacular welcome party and invite everyone in Ponyville!
The Ticket Master
Rainbow Dash: Everyone will be watching the sky. Their eyes riveted on the Wonderbolts.
Rarity: I would stroll through the Gala and everyone would wonder: "Who is that mysterious mare?"
Fluttershy: if you haven't given it to someone else
Rainbow Dash: I couldn't risk a goody four-shoes like you giving that ticket away to just anybody.
Rarity: We would be the belles of the ball, you and I. Everyone would be clamoring for our attention. All eyes would be on us. And then everyone would finally know, the most beautiful, most talented, most sophisticated pony in all of Equestria is Rarity the Unicorn!
Twilight Sparkle: You're going to have to wait for my decision just like everyone else.
Pinkie Pie: And to celebrate! Come on, everyone! The cupcakes are on me.
Twilight Sparkle: Anyone else? Anyone?
Griffon the Brush Off
Pinkie Pie: Is someone over there? Who're we gonna squirt, who're we gonna squirt?
Pinkie Pie: Oh! I've got someone in mind. The toughest around.
Granny Smith: A rattler! A rattler! Run for the hills! Everybody protect yourselves!
Pinkie Pie: I can take it, but no one treats Fluttershy like that! NO! ONE!
Pinkie Pie: Everyone, I'd like you all to meet Gilda, a long time dear friend of Rainbow Dash.
Applejack: 'cept when someone goes around showin' it off like a schoolfilly with fancy new ribbons.
Twilight Sparkle: I don't want anyone thinking I'm the showoff.
Trixie: When all hope was lost, the ponies of Hooffington had no one to turn to.
Trixie: Anything you can do, I can do better. Any takers? Anyone?
Spike: What we need is another unicorn to challenge her. Someone with some magic of her own.
Twilight Sparkle: I'm not better than anyone.
Trixie: No one can vanquish an Ursa Major. I just made the whole story up to make me look better.
Twilight Sparkle: And it wasn't rampaging. It was just cranky because someone woke it up.
Pinkie Pie: Sharing a laugh is a sure-fire way to get someone on your side.
Twilight Sparkle: Someone may look unusual or funny or scary, but you have to look past that and learn who they are inside.
Winter Wrap Up
Applejack: With proper care and sunshine, everyone it feeds.
Mayor: I was hoping my amazingly inspirational speech would urge everyone to do better than last year.
Call of the Cutie
Cheerilee: Now, can anyone tell me when a pony gets his or her cutie mark?
Apple Bloom: Everyone will just laugh at me and make fun of me and call me names.
A Dog and Pony Show
Rarity: Well, somebody certainly needs proper nail care.
Green Isn't Your Color
Spike: I'm gonna tell you two a secret. But you have to promise not to tell anyone.
Twilight Sparkle: But if I used my magic to help her do something unattractive on her next fashion show, no one would ever want her to model again.
Twilight Sparkle: You can't tell anyone about it. Promise me you won't tell anyone?
Rarity: Out there on the runway, everyone was turning on you and...
Spike: I still can't believe you told someone about my secret feelings for Rarity.
Over a Barrel
Rainbow Dash: Speaking of, somebody's popcorn kernels didn't get popped.
Rainbow Dash: Wow. You're pretty quick for someone so... bulky. No offense.
Rainbow Dash: Nobody tricks Rainbow Dash and gets away with it.
Little Strongheart: We didn't mean for anyone to be hurt.
Twilight Sparkle: Why won't anybody be rational and reasonable?!
A Bird in the Hoof
Rainbow Dash: Hellooo! Anybody home?
Fluttershy: No one. Never mind. I'll go home.
Rarity: Nobody move and my dress won't get hurt!
The Cutie Mark Chronicles
Pinkie Pie: Of course, if I was anyone, I'd be at Sugarcube Corner.
Pinkie Pie: And I wanted everyone I knew to smile too, but rainbows don't come along that often.
Owl's Well That Ends Well
Spike: Well... Maybe someone borrowed it?
Rainbow Dash: I wish I had someone to do whatever I told them.
Twilight Sparkle: No one could ever replace you, Spike.
Party of One
Spike: And sometimes, when no one's around, I do this.