In the USA, Europe and some other areas, both Sonic Rush and Shadow the Hedgehog were released on the same days/dates (15 Nov 2005 in USA and 18 Nov 2005 in EU).
Big the Cat is the only playable character from Sonic Heroes who does not appear at all in this game.
In the Sonic main series chronology, Shadow the Hedgehog takes place before Sonic Rush (despite both Shadow the Hedgehog and Sonic Rush being released on the same day). This is because at the Sonic boom 2013 event it was revealed that Shadow the Hedgehog takes place in the Sega Dreamcast era and is the last console game in the era, but not the last game because the last game in the Sega Dreamcast era is Sonic Advance 3. Then Sonic Rush takes place as the first game in the modern era, which takes place after the Sega Dreamcast era.
In a 2011 interview, Takashi Iizuka revealed that Shadow is his favorite character in the series, not counting Sonic himself.
Contributed By: Shotgunnova.
Connection to Other Media
The Egg Vacuum weapon is a reference to Billy Hatcher and the Giant Egg.
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