From Transformers War for Cybertron, it's the Siege toyline!
Lionizer is the Targetmaster partner of the Autobot Action Master Rad. Where his partner is cool and capable, Lionizer is a loud, angry, violent knot of overheated circuitry just looking for an excuse to go off. Considering he transforms from a robotic lion into an atom-smashing blaster his temper is something Rad has to constantly keep on top of, or Lionizer is likely to get them both into bigger trouble than either firepower or skill alone can get them out of.
Please note - cardboard package has slight peeling in one section (see pics).