Andrea Libman .
Ashleigh Ball .
Tabitha St. Germain .
Spike is voiced by Cathy Weseluck.
Ashleigh Ball, who not only voices Applejack, but Rainbow Dash as well.
Rarity is voiced by Tabitha Saint Germain.
Rarity is her full name. Some of the ponies have two-part names and some have one, such as her and Fluttershy.
My Little Pony: Friendship is Magic. This is the first step to any good scientific experiment. P.S. Fluttershy is best pony.
In the final part of the episode, A flash is rainbow is visible in Fluttershy's eyes, suggesting, as per this pattern of flashes of rainbows seen in previous episodes, that Fluttershy had recieved her key. It is not yet known what purposes these serve.
There is no way of knowing for certain until the episode comes out, but it seems to be a strong possibility.
My Little Pony: Friendship is Magic
My Little Pony: Friendship is Magic premiered on October 10, 2010.
None of the main characters in My Little Pony: Friendship is Magic have been revealed. We have seen flashbacks of Twilight as a school-aged filly, but no younger.