If you put a cake covered in fondant in the freezer when you bring it out, it will turn all gummy and tacky, looking quite unpresentable. If you need to freeze the cake, I would do it before you cover with fondant.
I had to freeze a fondant covered cake once, and it turned out OK. I covered the fondant in paper towels (to absorb any condensation) and wrapped it very tightly in saran wrap. It came out fine - but it was an all white fondant. I don't know what would have happened if I had colored it.
I would avoid doing this if you can help it - but the one time I had to, it came out OK.
Yes you can but when you take it out just leave it and the moisture will reabsorb but DO NOT touch it. I myself do not like anything frozen except peas and icecream but my cake teacher told me you can do this especially if you turn over hundreds of cakes
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