Sonic Generations 2

This sequel is longer & has more bosses.

Rivals

 * Kunckles (from Sonic & Knuckles)
 * Metal Sonic (from Sonic CD)

Bosses

 * Egg Mobile-H (from Sonic the Hedgehog)
 * Big Arm (from Sonic the Hedgehog 3)
 * Death Egg Robot (from Sonic the Hedgehog 2)
 * Kyodai Eggman Robo (from Sonic & Knuckles) (Final Boss of the Classic Era)

Rivals

 * Team Chaotix (Vector the Crocodile, Espio the Chameleon, Charmy Bee) (from Sonic Heroes)
 * Rogue the Bat (from Sonic Adventure 2)
 * E-123 Omega (from Sonic Adventure)
 * Shadow the Hedgehog (from Sonic Adventure 2)
 * Chaos (from Sonic Adventure)
 * Black Doom (from Shadow the Hedgehog)

Bosses

 * Egg Viper (from Sonic Adventure)
 * Biolizard (from Sonic Adventure 2)
 * Egg Emperor (from Sonic Heroes)
 * Devil Doom (from Shadow the Hedgehog)
 * Perfect Chaos (from Sonic Adventure)
 * Metal Overlord (from Sonic Heroes)
 * Finalhazard (from Sonic Adventure 2) (Final Boss of the Middle Era)

Rivals

 * The Deadly Six (Zavok, Zeena, Master Zik, Zor, Zomom, Zazz) (from Sonic Lost World)
 * Blaze the Cat (from Sonic Rush)
 * Silver the Hedgehog (from Sonic 06)
 * Erazor Djinn (from Sonic & the Secret Rings)
 * Mephiles the Dark & Iblis (from Sonic 06)

Bosses

 * Egg Cerberus (from Sonic 06)
 * Alf Layla wa-Layla (from Sonic & the Secret Rings)
 * Egg Genesis (from Sonic 06)
 * Dark Queen (from Sonic & the Black Knight)
 * Egg Wyvern (from Sonic 06)
 * Nega-Wisp Armor (from Sonic Colors)
 * Egg Dragoon (from Sonic Unleashed)
 * Perfect Dark Gaia (from Sonic Unleashed)
 * Nega-Mother Wisp (from Sonic Colors)
 * Solaris (from Sonic 06) (Final Boss of the Modern Area)

Final Area

 * Time Eater
 * Phase 1: It's based off the fight fron the 3DS.
 * Phase 2: Time Eater Sonic: He betrays the 2 Robotniks & absorbs all of Sonic's friends & uses a Sonic-like Form Time Eater takes.
 * Phase 3: Time Eater Final Form: It's based off Nibroc-Rock's render.