Remember that quirky screenshot from Sonic Colours last week? SEGA have confirmed that there'll be 2 player co-op in the Wii game.
Sonic's palette is set to expand with a nifty new multiplayer mode that's hidden away in the upcoming Wii release. According to IGN if players collect enough secret rings scattered through the main game, the bonus mode will unlock a host of challenges specific to two players.
Work together as Sonic robots to overcome Eggman's devious obstacles using wisp abilities, and at the same time try to nab as many rings as possible.

Over on the Sonic Blog, SEGA posted seven things you may not know about the new game:
1) Dr. Eggman has built his park after developing a sense of remorse for his past “indiscretions”. Hmm… a likely story.
2) At one point in an early cutscene Sonic “breaks the fourth wall” and talks directly to the gamer.
3) SA-55, the round red robot also known as “Ergo” by fans who appeared in Sonic Unleashed will return, but slightly more jaded than before. Oh and by the way SA-55 ISN’T his name… his name is actually “Orbot”
4) Orbot also has a counterpart this game… who we’ll be revealing next week.
5) Tails’ “Miles Electric” handheld device that appeared in Sonic Unleashed makes a re-appearance.
6) The boss you have already likely seen from Tropical Resort Dr. Eggman refers to as the “Big Boy”.
7) The curly haired white Wisp is important to the Colours story and its name is…. something you’ll have to tune in next week to find out!