My male mouse?? help?

yes, two males in one cage is never a good idea, they will get very territorially even if they were together in the pet store. get a new cage for one of them. you may want to put some anti-bacterial ointment on the one who was attacked if there are any open cuts of scratches, they may get infected. if he is really beat up, then bring him to the vet. also, there isn't too much you can do about the smell in the male's cages, it's hormones and the only thing you can do is clean it pretty often. best of luck! Bye!