Full-res shots from this page.

Because I hadn’t really done much with the Mane Six prior to this, a lot of elements are repurposed from Star Mares characters (though of course those elements were originally taken from show screenshots, but some of them so long ago that I can’t remember precisely where). Pinkie Pie’s ‘zapped’ hair was taken from Gracenote disguised as a poid, but I think it originally came from Rainbow Dash (or possibly Twilight).

Ignore what’s going on in the background of the 7th panel. That shot was supposed to be the Garrett pony’s exit from the fight, but obviously isn’t anymore.