Characters from left to right:
 
Power Ponies:  
Humdrum  
Saddle Rager  
Daring Do  
Radiance  
Masked Matter-Horn  
Zapp  
Fili-Second  
Mare Do Well  
Mistress Mare-velous
 
 
Anti Hero:  
Flashfire:  
A heroine Dragon that is tasked with hunting down evil elder Dragon that have escaped from Tartarus.
 
 
League of Villainy:  
Shadowmane  
Long-Face  
Ahuizotl  
Pharaoh Phetlock  
Mane-iac  
Flare-De-Mare  
High Heel  
Ne’er–Do–Well/Negamare  
Smudge
 
 
Villain:  
Bad Horse:  
A enigmatic horse that’s considered a Living Legend within the criminal underworld. Appears to be nothing more than just an ordinary horse, and yet commands the respect of everypony around him with an iron hoof. Just mention the name Bad Horse and Maretropolis’ criminal underworld shudders. Compared to most villains in that he doesn’t seem to have any superpowers or enhanced combat ability. Where he came from, how he rose to power, and what he’s capable of are unclear. Then again, nopony has ever seen what he can do and lived to tell about it.