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©Hasbro