At my job, we get frozen cheesecake all the time. It's wrapped in plastic, that we have to remove before thawing. If it's already sliced (which is usually is), there is waxed paper or parchemtn between the slices.
jennyema is right, though. Commercially-made cheesecake is flash-frozen in a blast freezer at -50°F or colder.
Peace, Love, and Vegetable Rights!
Eat Meat and Save the Plants!