First two of each Species?

[RLisa]

Difficult to remember which was the first one! I think my parents bought a bunch of them at once at flea markets.

Earth : G2 Clover and Sky skimmer
Pegasus: Dutch rabbit and I remember always playing with my favorite trio: Medley, Starshine and Skydancer
Unicorn : Glory and G2 princess Swirl
Wingers : little flitter (she had only 1 wing) and buzzer
Flutter: lily and morning glory, both without wings
Babies: probably g2 dreamer and drifter

I do remember buying my first g3 ponies,  they were fluttershy and tink a tink too

[SpacePinto]

Unicorns:
1. Fizzy
2. Gusty

Pegasi:
1. Wind Whistler
2. Hearth Throb

That's it for now.