Swifthom covers Dr. Robotnik.
In Part 2, Crazy Penguin analyzes the rest of the games.
A look at Amy Rose's character over the years in various universes.
The debate over which games are part of the Sonic storyline and which ones aren't. In Part 1, Crazy Penguin does a rather thorough analysis of the games that everyone considers to be part of the Sonic storyline giving his views as well as theories to deal with plot contradictions found in them.