Nintendo is not working with SEGA, yet... ;) SEGA is simply bringing their Sonic characters to Nintnedo systems (for the very first time, I might add). SEGA has decided to quit the console competition because Sony killed their DreamCast when the PlayStation 2 came out. So now, SEGA is developing for all the new systems (I do wish they'd stick to Nintendo...)!
Out of all the new systems, SEGA is supporting the Nintendo GAMECUBE the most. That is good, becuase they shouldn't waste their time working with crappy systems like Microsoft's Xbox and Sony's PlayStation 2!
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"Bwa ha ha! Guess who it is, loyal Mario fans...
It is I, King Bowser... ruler of all Koopas, big and small. I have come to take over the Mushroom Kingdom (no, not the place...I mean the WEB SITE!)! Deezer, you will surrender your troops to me, or else you will never see your precious Mario again! Bwa ha ha ha ha ha ha ha ha ha!"