Compilation of various Sunset vectors showing most of her outfits and forms. All credit to the original artists for their work. Vectors used in this image linked below:
 
Pony - >>343253  
Human - >>387933  
Demon - >>1125541  
First prom dress - >>449724  
Second prom dress - >>440859  
Third prom dress - >>589002
 
Sunset Shimmer’s Time to Shine design - >>824152  
Ponied-up - >>991481  
Jacketless with guitar - >>1790148  
Rainbow Rocks merch - >>945424  
Sunset Phoenix - >>1804318
 
Friendship Games - >>992620  
Flung coat - >>994011  
Friendship Games merch - >>1122354  
Friendship Games dress - >>1008385  
Lab coat - >>958401
 
 
Motorcross outfit - https://mlp.wikia.com/wiki/File:Friendship_Games_Sunset_Shimmer_Sporty_Style_artwork.png  
Daydream Shimmer - >>991501
 
Camp Everfree outfit - >>1278856  
Camp Everfree merch - >>1344621  
Camp Everfree Crystal Gala dress - >>1384458  
Camp Everfree ponied-up - >>1262475
 
Dance Magic Tango outfit - >>1438041  
Dance Magic Cowgirl outfit - >>1495384  
Daring Do character costume - >>1493347  
Movie Magic Mane-iac outfit - >>1442913  
Redesigned pony - >>1658823
 
Digital series - >>1599243  
Sushi uniform - >>1782966  
Director outfit - >>1799340  
Flanksy outfit - >>1582672  
Swimsuit - >>1650575  
Digital series ponied-up - >>1666060