Mario Kart Wii Questions!?

What are Mirror Mode Retro-Cups? How do I get it? _______________________________________________________ How do I unlock all the characters and vehicles? _______________________________________________________ How do I unlock ROSALINA without another... show more What are Mirror Mode Retro-Cups? How do I get it?
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How do I unlock all the characters and vehicles?
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How do I unlock ROSALINA without another game?
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After I unlocked the cups what else can I do?
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Is there anything else to unlock?
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After I won the 50cc, it said I was able to play Gran Prix Karts and Bikes...what does that mean??
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Anything else about Mario Kart Wii is helpful..thanks!
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What are Mirror Mode Retro-Cups? How do I get it?
What are Mirror Mode Retro-Cups? How do I get it?
What are Mirror Mode Retro-Cups? How do I get it?
??? I really want this answered the most..
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Thanks
Update: I did win a trophy for all of them! Do I have to get first place or star ranking to unlock mirror mode?
Update 2: Thanks for the answers
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