Weaknesses. Imperfections. Flaws. Whatever you want to call them, we all have them; I don't care who you are. Naturally, this eventuality carries over to media. A character without some kind of flaw is usually written off as being impossibly perfect, so care is usually taken to avoid that kind of assumption.
The Sonic the Hedgehog series is no different. No member of the cast is the best at everything or loved by all. Whether it is a physical weakness, a personality quirk, or something else entirely, each character is flawed in some way and, in turn, those flaws make him or her more relatable.
I'll list the flaws for everyone who's been in