Adults:
Unicorn - Windy the Rainbow Pony (first pony)
Earth Cherries Jubilee (3rd pony)
Pegasus - Masquerade (4th pony)
Adult Boy - Sunburst
Babies:
Baby Earth - Baby Blossom (2nd pony)
Baby Pegasus - Baby Bright Bow
Baby Unicorn - Baby Rain Ribbon
Baby Boy - Baby Lucky
Newborns
Newborn Earth - Club Newborn white (I think I had her first)
Newborn Pegasus - YoYo
Newborn Unicorn - I am not sure because it would be a carboot find but I think it's probably either Sniffles or Snookums.
Teeny Weeny - Little Lullabye (I got her Dec 23rd 1992, when we went to the theatre in Birmingham!)
Flutter pony - Tropical Breeze (bought with birthday money, 1987)
Winger - High Flier (carboot sale)
Baby Sea Pony - Sunshower (uk pose)
Adult Sea Pony - either Seaspray or Surfdancer from the carboot sale. Online it would've been Sea Breeze but I am pretty sure I had the UK pair first.
Baby Mermaid - Baby Sea Shimmer. My sister had all three of them before this but Sea Shimmer is the only one I have
Mummy Charm - Funny Face
Petite Pony - Princess Moondust & Kingsley from the castle.
Dream Beauty - Morning Glory, Crystalline and Dream Gleamer all together from a trader in Australia
G2 earth pony - Berry Bright (she is still my favourite)
G2 unicorn - Silverswirl
G2 (clip on) pegasus - Princess Twinkle Star or whatever her name is - the pink one with pink curly hair.
G2 baby - one of the sets of twins. Probably Jewel and Sparkle
G3 Earth pony - original Rainbow Dash (with whom I graduated in 2003)
G3 Unicorn - probably Rarity
G3 Pegasus - Starcatcher
G3 Breezie - Zipzee
G3 Baby - Keen Bean or Bellaluna. Not sure which.
G4 Earth Pony - Applejack (2011 release with forelock)
G4 Unicorn Pony - Rarity (2011)
G4 Pegasus - Lily Blossom (2011)
Did I cover everything?