Canon MLP Species

The main Three Pony species.
Unicorns, Pegasai and Earth ponies make up the majority of the of the populace of the ponyverse, their traits are pulled from the show. Citing the MLP:FIM wikia for more information on these types.

Unicorns
http://mlp.wikia.com/wiki/Unicorns

What makes the unicorn unique from their fellow ponies is their horn which grows from the forehead. With this horn they are capable of Magic without the need for enchanted artifacts, crystals or runes. The unicorn's abilities are based on his or her cutie mark or the amount of study the unicorn puts into their magic

Unicorns get the fallowing

unicorns get Magic hand and light free

+2 con +2int -2 dex

Pegasai
The noble Pegasus is a Pony capable of flight. their bones are less dense then that of the other two races. On the earthsphere many of this race was employed in weather factories making clouds. They have the ability to walk and live in and on Clouds which many used to make their homes from. on colonies this is rather disallowed however planetside they are freely able to do this within reason.

 Pegasai Get'''

  Fly ability

+2dex +2wis -2str

Earth Pony
The basic Pony in the bunch, but don't let that fool you. Earth ponies tend to have ingenious ways of getting around. Sturdy and strong these little ponies can take on a lot. Back on old Earth they were mainly farmers, cooks and party planners

Earth ponies get

-2 dex +2con +2str