Here it is!
US G1 ponies:
Springy
Sandcastles
Shovels
Baby Squirmy (upgrade)
International G1 ponies:
Baby Applejack
Any Mountain Boy except Ice Crystal and Sunburst
Baby Bridesmaid
Baby Pony (all white)
Love Token
Moondream
Sunset
Highlights
Nurse Loveheart
Surprise Newborns Baby Bouncy, Baby Cuddles, and Baby Snoozy
Kisscurl
G2's *out of date, need to update*
Satin Splash
Tipsy Tulip
Prince Clever Clover
Lady Sky Skimmer
Princess Sweet Berry
Bright Bramley
Dizzy Lizzy
Princess Trixiebelle
Princes Ivy
Lady Moonshine
Flash
Hip Holly
Merry Moments
Baby Fern
Baby Dew
Baby Swirly
Baby Twinkles
Baby Tickle Heart
Baby Sunbeam
Baby Honeyberry
Prince Firefly
Giggles and Wiggles
Baby Jewel (twin)
Sweetheart and Trueheart
Fire and Flame
Baby Sweet Snowflake
Baby Dreamer
Stardust and Moondust
Baby Flitter
Night Star
Floral and Baby Petal
Princess Fushia
Prince Fauna
Lady Dragonfly
Lady Rainbow
Lady Rainbow
Jolly
Spring
Lady Elegant
Tenderheart
Nosy and Click
Study and Play
Golden Glow
Silver Glow
Festive
Apple Pie
Night Shine
Eve
Globe Trotter
Mimosa
Medicin
Precious
Magic Butterfly
Magic Diamond Glow
Magic Dragonfly
Melody
Muse
Her Majesty Ballerina
Her Majesty Great Romance
Her Majesty Pearl
Glittery Skater
Glittery Study
Honey
Puff
Waterlily
Miss Chef
Miss Painter
Springly
Springdy
Bubble
Curly
Sunshine and Sunny
Rose and Lily
Rumba and Samba
Autumn
Snowball
Bride
Coral and Ocean
Little Pretties
http://www.ghostofthedoll.co.uk/littlepretty.htmFlutterina
Ginger
Bow
Pinkheart
Snowy Fur
Perfuma
Prize Petal
Baby Bibsy
Baby Tee Hee
Peach Blossom
Bitsy Bouquet
Happy Heather
Lady Lovely Locks
http://www.ghostofthedoll.co.uk/ladylovelylocks.htmMerrycurl the dragon
Any pixietails. I hoard them.
Keypers
http://www.ghostofthedoll.co.uk/keypers.htmTabitha the kitten
Bobble the puppy
Diamond the horse
3DS XL:
Any cute 3DS XL pouches from Japan. Sadly, they can be pricey.