Quote from RawGreen

It's basically a bandwagon that was pretty massive and common for people to want to hop on to.
You open a thread, call it a mania, register now- etc. They were all over the place back in 2007 or so.
The majority of them never got finished.

All of them followed this trend;
Make a form for people to fill out what their stickfigure's name, color and power is.
A ton of different people post in your thread with their characters.
Some people get so excited they don't follow any rules or guidelines.
And then you(yourself) animate all those characters duking it out with eachother.