|Colosseum Highway Zone|
Colosseum Highway Zone is the second level of Sonic Rivals for the PSP. A Roman-themed area with giant centurion statues and stately, Doric columns, the Zone contains two Acts plus a boss fight at the end. As with most of Sonic Rivals, the Zone is located on Onyx Island; which is Angel Island from the future, warped to Sonic's time by Eggman Nega.
Looking just like it could have been lifted out of a first-century latifundia, Colosseum Highway can't quite make up its mind whether it's an Ancient Ruins cliché or not. While the occasional statue goes headless and one or two aqueducts curtail abruptly, most of the Highway remains intact. Manicured trees and ivy creepers adorn the stately courtyards of antiquarian villas, and bubbling fountains decorate the background.
After defeating the Egg Turtle in Forest Falls Zone, Shadow decides he's had quite enough of the Doctor's apparently contradictory orders, and is about to write his trip to Onyx Island off as a waste of time. However, Rouge proceeds to contact Shadow via transmission, and tells the Ultimate Lifeform that he should keep following "Eggman". Knuckles, still chasing after the fat man for the Master Emerald card, becomes the unlucky target of Shadow's scathing put-downs, and the two race off after the fleeing scientist.
Silver, meanwhile, is try to explain to Eggman Nega that he just wants to question Robotnik about Dr. Nega. This leaves the futuristic hedgehog standing in Sonic's way as the Blue Blur attempts to take back Tails and Amy's cards, pitting them against each other for Colosseum Highway.
|Act 1||vs Silver||vs Shadow||vs Knuckles||vs Sonic|
|Act 2||vs Silver||vs Shadow||vs Knuckles||vs Sonic|
|Boss||vs Silver||vs Shadow||vs Knuckles||vs Sonic|