Wave Six Blind Bags

Via: BrightIdea on the Arena. From Taobao.

 Here is a list of what is in the set:

1- Pinkie Pie
2- Fluttershy
3-
4- Rainbow Dash
5- Rarity
6- Applejack
7- Minuette
8- Roseluck
9- Trixie Lulamoon (with gem symbol)
10-
11-
12- Berry Green
13- Merry May
14- Cherry Spices
15- Electric Sky
16-
17- Amethyst Star
18-
19- Sassaflash
20- (Magnet?) Bolt
21- Royal Riff
22- Peachy Sweet
23- Chance-a-lot
24- Shoe Shine

Confirmed, but number unknown:
Twilight Sparkle 
Mosely Orange

So that leaves 3...  likely to be:
Twilight Velvet (with gem symbol)
Crimson Gala
Twilight Sky