Now, I will do a list of Sonic Fanfiction cliches.
1) All female characters portrayes as defenseless and weak.
2) Robotnik killing a Mary Sue's entire family.
3) "Goofy" characters, like.the Chaotix, being killed off.
4) Mephiles coming back.
5) Mary Sues with long hair
6) Shadow saves the day.
7) Robotnik portrayed as extremely sinister
Anyone want to add more?