This is based on the work of dogchicken originally posted here and the energy sprite can be found here:

http://opengameart.org/content/cat-fighter-addon1-energy-force-master-kit

Using the art from IsometricRobot posted here to recreate the energy force master kit addon: 

http://opengameart.org/content/dog-fighter-cat-fighter-remix-base-add-on...

The dog assault kit can be found here: 

http://opengameart.org/content/dog-fighter-addon2-assault-rifle-kit#comm...

The following is the copyright notice from IsometricRobot:

"Dog Figher by Michael J Pierce @ IsometricRobot.com" or Display the IsometricRobot mascot in one of his forms (anywhere is the associated work) with a link back to IsometricRobot.com And including the following: "Based on the work of dogchicken - "Cat Fighter"" with link to http://opengameart.org/content/cat-fighter-sprite-sheet Unless Otherwise specified by dogchicken at this link.