Before you blame me for turn a Team Fortress 2 class in a female pony, I want to say you that this idea comes from an epic fan fic called “Waking Nightmares”. And also, if you hate ponys and pony crossovers with all your soul, don’t even look at this (but remember: this is the rule 85 of the Internet)
 
A quick summay of the fic would be: “the BLU team gets teleported to Equestria and turned into ponys. Now they must find a way to return home while they fight against a misterious threath. Meanwhile, Celestia is being hunted by a dark creature with no face”
 
This story is really good. The plot works very well and contains comedy, a bit of drama, adventure, references to certain pony fics (cofcofcofcupcakescofcofcofpattycakescofcofetc…) which many may don’t like, but they have a reason to be there ( I don’t want to give many spoilers), a bit of romance, references to G1, Slen….ups nevermind, Derpy Hooves, a bit of horror and long chapters.
 
On short: if you like TF2 and MLP: FIM (and certain creature with no face) this is your fic
 
Pyro ~ Valve  
My little pony firendship is magic style ~Hasbro  
Waking Nightmares ~ KnightMysterio (this guy is also the author of “Mothers”)