Character description from "tech spec": 
Consumed by a hunger for self-improvement, Leozack was one of the first Decepticons to volunteer for Skyquake's experimental flight refit.  While he is a mere foot soldier in Megatron's revolution, and currently under the direct command of Skyquake, Leozack has greater ambitions.  Through discipline and cunning, he hopes to one day rule the Decepticons.  To this end he has already begun plotting, hoping to lure other Decepticons to his side.  In combat, Leozack is an expert martial artist and aerial combatant.  Experimental combat upgrades give him immense fierpower, but at the cost of direct control of his weapons and transformation system.  As such, he must activate them using voice commands.  His "Ultimate Technique," the jet Attack, unleashes vast destruction but leaves him almost completely drained of energy.  In addition, he often uses melodrama to keep his foes off-balance during combat.

Other Appearances:

Bibliography of significant appearances: In this toy form, his only fictional appearance is in the Botcon 2009 comic, Wings of Honor.  Whether he makes any appearances in the collector club comic remains to be seen.