For the moment only will be accepted as PCs, which includes:
They have a higher physical strength and speed on foot (or should we say hooves?) then the other two types, but lack magic abilities/telekinesis and aren’t as mobile as a Pegasus.
The Earth Ponies may seem to be the least interesting of the three types of ponies, however they have a big advantage over the others in their lack of obvious and crippling weak points.
They are the second strongest physically and they have a great degree of freedom of movement thanks to their flight abilities, permitting them to scout over any adverse terrain with ease. However they are not as fast and agile on earth as Earth Ponies and Unicorns (for example in the case of wing damage), they have no magic affinity and their wings aren’t able to sustain much more weight other than their own body (in the case of a generic Pegasus(3)).
They are generally the weakest ponies of the three types, however they can count on magic abilities as telekinesis, giving them access to a great number of skills.
A normal Unicorn(3) has not more than one magical skill (other than telekinesis) directly correlated to the his/her cutie mark. This skill must specified together with the species in the character sheet, i.e. “pyrokinetic unicorn(3)”.