Notice: Here's a link to the Mega Article @ The Lion King Wiki. -- The Staff
Mega is a grown up male lion who appears at TLK6NA and laughs at young Kopa.
He's in Vulture Shock. The reason he laughs at Kopa is because Kopa is searching for his family tree.
I do know little about this character, is he a King of a land near the Pride Lands? Is he a rogue? Are the lions on the background his family members? How are they related?