Well, the wiki is doing a vote on the names for these two, so I guess if you guys want, you could vote on them or something.

We need a name for the barker, too.

G1 buttbow!

@The Wandering Pikachu  
Well yeah, I can’t wait for that one! :D

I wonder how many songs there was cut.

@Background is Best Pony  
Yeah, at a later glance, I thought that taller one was Moondancer’s unnamed sister with another filly/sister. But looking at her zoomed in, I see it’s not her. Dat mane style/coloring similarity though… but her coat is a lot brighter and eyes are different, not to mention the cutie mark.
 
@Background is Best Pony  
Considering an upcoming episode features the whole Pie family with the Apples in Ponyville, I doubt there would be reason to involve said sisters in an episode shortly before. And Maud was already in an episode this season, anyways. Though I hadn’t expected her OR Coco to make appearances again after last season! :O
 
@Trahzo  
Probably cause she didn’t likely know about it… plus, they live in Canterlot.

@Trahzo  
Rainberry is the filly and Rainbow Stars is the mare.

@Trahzo  
Pinkie should have brought Inkie or Blinkie or Maud! XD

Which one’s Rainberry and which one’s Rainbow Stars?

@Background is Best Pony  
Dammit, why didn’t Moon Dancer bring her sister? I won’t complain about the princesses because those 4 are unfair fights!

@Background Pony #8E47  
I’m all for that being their names.

from the thumbnail look like rainbow star wear socks in the fronts hooves

@Marshal805  
Thank you!

@Background is Best Pony
 
… Only after you mentioned it. But yeah… wow. Like, socially not awkward Moondancer, and happily singing Moondancer. Only, not, because we’ve seen Moondancer’s sister. Maybe another pair of sisters, or cousins.

@Background Pony #7ECB  
Lucky Charms. I like it. Maybe her sister/cousin/orphan friend is Lucky Stars? /shrug
 
 
@Background Pony #8E47  
Those are good too.

Does anybody else think of Moondancer when looking at these two?

@Background Pony #7ECB
 
@Background Pony #8E47
 
Not bad.

@Marshal805  
And I can’t believe how much they fucked it up

How about Rainbow Stars and Rainberry?

She could be named lucky charms. She reminds me of lucky charms because of the stars and rainbows+ the fact she has red hair like the lucky charms cereal guy.

In the thumbnail I thought the guy’s hair was a pair of stockings or something. XD
 
But yeah, they need a cute name.

@TheAntiCat  
I still can’t believe that’s now a live action movie.

Gem and her Hologram
 
(I’ll leave now.)

They need names!