Sonic Rivals 2 review at Gamespy.

"There's no denying it. Over the past few years, Sega's true blue speedster has missed a step or two. Once the co-ruler of the gaming kingdom alongside a certain plumber, Sonic's last few game entries have lacked the excitement that fans had grown to love. With Sonic Rivals 2, though, it looks like the hedgehog may have caught a second wind and gotten himself back into the videogame race."

Full Source: Gamespy