Shampoo and conditioner are provided but I don't recall mouth wash being available and the blow dryers are barely useful.
If you plan on taking your own dryer, pack yourself a light extention cord if you want to use it in the bathroom as they only have a shaver outlet in there.
Robes are not provided in all categories as a standard item. They are available in all 'S' (suite) category. If your category is not an S, and your stateroom does not have robes, then befriend your cabin steward and ask if he could obtain them for you, with a little gratuity assistance.