Anniversaries/January 31
From Sonic Retro
January 31 (add)
- 2008 — Super Smash Bros. Brawl is released for the Wii in Japan, featuring Sonic as a guest fighter.
- 2013 — Sonic & All-Stars Racing Transformed is released on Steam in North America, Europe and Australia.
- 2015 — "Cowbot", the 11th episode of Sonic Boom, airs in North America.
- 2019 — The Wii Shop Channel is shut down, rendering all Sonic games on the store unavailable.