Sonic is another one of those nintendo series that is slowly disappearing. I know that there have been many new sonic games out there, but you don't hear about them and when you research further you find out that the newer sonic games aren't that good.
Sonic and mario used to be two of the classic nintendo games. Mario has continued to live on and have a success, but sonic will need some serious rescuing if it will maintain its popularity.

Hopefully, sonic makes a comeback!