Anniversaries/April 9
From Sonic Retro
April 9 (add)
- 2008 — Issue #187 of the Sonic the Hedgehog comic series by Archie Comics is released in North America.
- 2014 — Sonic Unleashed is made available for digital download on the PlayStation Store in Europe and Australia. Sonic Select Book Nine: The Games, a trade paperback, is released in North America.
- 2016 — Mario & Sonic at the Rio 2016 Olympic Games is released for the Nintendo 3DS in Australia.
- 2020 — "Uchū Yōsai Metaru Puranto", the 63rd episode of Sonic X, airs in Japan.