I want that tipical MMORPG
-Name of the game: My little Pony online - Grand Voyage
-protagonist: Your selfmade character. Character creation should be like the pony creator, but in 3D.
-antagonist: Well... the monsters of the ever free forest for example
-health/battle system: Like Guildwars 2. Skills, but active movemtn system, like doing barrel rolls for pegasi or stuff
-the story: As the title says it should be a really long travel for your pony, to see aaaaaaaaaall of equestria, meet interesting people and help them do a lot of stuff around. There shouldnt be normal killing stuff quests... but more riddles and stuff
you could also use the system of guildwars 2 for that with all the instanced character stories and stuff
-how do you want the levels or rooms: Well like equestria. Except it should be possible to build "guild" villages. But that should be very expensive and stuff... the perfet thing would be to have it like the sims for building the houses there...
-Special features: Love and Tolerance online