Oh man this one. This one is old. This comes from a friend I used to know (I guess still know) on the NSFCD irc. This actually predates Lethal League Blaze by a number of years, so that's how old it is.

The original sketch, which I can't find anymore, was done by CiiMassacre. And I no longer remember who colored it, probably someone else from NSFCD. Coloring and digitization was done by a guy named HaroldGenhi on the mlpforums in the year 2015

I've been uploading commissions here so I don't lose them, and had the random flash of memory of the very first one I ever got, Latch from Lethal League.