Generator Rex was better than Ben 10, but at the same time, I completely understood why it never really caught on. Rex's transformation aren't super appealing to most kids. The EVOs are mostly just masses of mindless flash and would be difficult to mold for toys. There were simply too many factors working against it.

The best track of any action cartoon of the last decade https://www.youtube.com/watch?v=klWCNxdHvas