Why do the Insecticons appear in the third season? The real world answer is when the Five Faces of Darkness episodes were being created, the writers had no idea who the reformatted Decepticons (other than Galvatron) were. For all that they knew, they were all new characters. That's also why Cyclonus acts nothing like Bombshell. The most logical in story answer is to excuse them as leftover clones.