Pony Sketch Requests - Set 1

Hello! Here's the first set of 5 ponies, each requested by friends on This Pony Requests Journal!

Windy Gem was requested by and belongs to Fern5223
Spark Storm was requested by and belongs to mechafone
Firefly was requested by Edderstria and belongs to MLP G1
Trackhead was requested by and belongs to bugatti2005 
Crescent Color was requested by and belongs to Alycat2211

Art belongs to SJArt117, that's me!

Please don't use, recolour, trace, base or reference. Thanks!

The camera isn't great, and lacks a lot of the original pieces' detail. Sorry about that!