Sonic Colors Ultimate Brings in Metal Sonic for Rival Rush - Siliconera

Sega detailed Sonic Colors Ultimate improvements and additions in a new trailer, and Metal Sonic will appear for a Rival Rush mode.

Doctor Eggman Sonic News Network+BreezeWiki

Doctor Eggman, Sonic Wiki Zone

Rival Rush with Metal Sonic, customizations highlighted in new Sonic Colours Ultimate update - Tails' Channel

Super Smash Bros. for Wii U - Super Mario Wiki, the Mario encyclopedia

Rival Rush by SuperSonicThomas on DeviantArt

🎮 Sonic Colors: Ultimate News

Team Sonic Racing, Sonic Wiki Zone

Sonic Colors Ultimate: Metal Sonic by Nibroc-Rock on DeviantArt

Sonic Colors Ultimate: How to Unlock Rival Rush

Sonic Colors: Ultimate screenshots show Rival Rush, customization, more

Sonic The Hedgehog - A Little Ball of Energy in an Extremely Handsome Package

Rival Rush with Metal Sonic, customizations highlighted in new Sonic Colours Ultimate update - Tails' Channel