Lightning Rocker is a Guard Pony in unit 140 under Sgt Stuka.

About Lightning Rocker

Lightning Rocker, usually just called Lightning, is a friendly helpful Guard Pony.  He is a private in Unit 140.  Lightning is a colt Pegasus.  His special ability is that he is very strong - his cutie mark is a lightning bolt and a large boulders.  He got his cutie mark helping somepony who's house had been damaged by an avalanche, Lightning moved the large boulders out the way.  As a young pony he always wanted to join the guard, so is equally happy doing mundane patrols or helping around the barracks as well as anything more adventurous.  He is just happy to help anypony and for the good of Equestria.