Artist’s notes:
 
There’s not all of them, and I’m not sure if I’m gonna add the missing ones later. So much work. Too much work. I’m dead now.
 
From the top left:
 
Fizzy, Galaxy, Majesty, Mimic, Buttons  
Moondancer, Starflower, Speedy, Milky Way, Ribbon  
Beach Ball, Star Hopper, Tabby, Red Roses, Princess Sparkle  
Sunbeam, Pinwheel, Powder, Tuneful, Skyflier  
Gypsy, Glory, Buttons(Twice as Fancy), Boysenberry Pie, Cloud Dreamer  
Twilight, Sparkler, Hula Hula, Sugar Sweet, Moonstone  
Bouquet, Twist, Bangles, Windy, Princess Misty  
Fifi, Twirler, Dazzleglow, Gusty, Coco Berry
 
Background bubbles from: http://monib.deviantart.com/art/Bubble-Brush-73532206
 
MLP(c)Hasbro