From Sonic Retro
December 7 (
- 2003 — "Threat From Outer Space", the 36th episode of Sonic X, airs in Japan.
- 2006 — Sonic the Hedgehog is released on the Wii Virtual Console in Australia.
- 2007 — Sonic Rivals 2 is released for the PlayStation Portable in Europe.
- 2012 — Sonic & All-Stars Racing Transformed is released for the PlayStation Vita in Russia.
- 2018 — Super Smash Bros. Ultimate is released for the Nintendo Switch worldwide, featuring Sonic as a guest fighter.