"Given how often Spike is treated like garbage in the show, I have often wondered what would happen if the writer's took advantage of that lazy angle and did something interesting with it, like turning him evil.

Also, when "Power Ponies" was coming out, I had hoped that something like this would happen.

After attempting to try and prove that he can be of use in a fight, and once again looking like a fool due to bad writing, Spike suggests maybe he try giving into a little greed to grow bigger and stronger.

But Twilight immediately reminded him of what ultimately happened the last time his greed got out of control.

Unfortunately, Chrysalis was listening in on their conversation, and knew then and there that the strength of a dragon was exactly what she needed for her villainous schemes to be victorious."