I should think you can. We have a lop rabbit and it has a corner pot to urinate and poo in.
Dwarf rabbits might have a reputation of being a little naughty. I don't know if this affects their trainability but, generally speaking, pet rabbits can be litter-trained, and they can be socialized to be gentle and friendly and (somewhat) obedient. Some also like endurance training (jumping). See Related Questions (below) for more information.
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