"Discord is like a reindeer or something from the My Little Pony continuity family.

"Discord hangs out at Maccadam's Old Oil House. He drinks a lot."

TFWiki on 'Discord (animal)'

The actual character designer of Transformers: Animated is a massive nerd who has worked with Lauren Faust on Foster's Home.
He was asked to draw some faces for the almanac that chronicles that series's continuity.
He had just seen the Discord two-parter and loved it.

Sketch version at >>986444.
Full version at >>986450.