this is he's backstory --->http://madnesscombat.wikia.com/wiki/Tricky
fan made video:
and here is he's theme
and here is he's piss off theme
aslo this
http://cyberagent369.deviantart.com/art/Season-Finale-Discord-vs-Tricky-the-Clown-534259085
"Yeelon also ''Demon'' is a mysterious character who only appeared in Incident: 111a and not in any canon episode.
The Yeelon's mouth is a reference to "SCP-087-B". It is also rejected the concept of the Tricky and Auditor crossover in Madness Combat 11, as confirmed by Krinkels."
-Madness Combat Wikia