Mego's World Greatest Heroes was a toy line from the mid-70's to the early 80's and one of the first companies to make superhero action figures. It was the first Batman-related action figures I owned as a child and I've always been fond of them.
Some of the first professional action figure customizers worked with Megos. It's these Mego customs where the idea for the TV show Robot Chicken came from.
Needless to say, there are lots of great custom Megos out there, especially of the Killer Moth!
If you want to learn more about Mego action figures check out the amazing Mego Museum website (where many of these pictures are from)!
EDITORS NOTE: If anyone knows where I can get a Mego Killer Moth custom, contact me!!