Somebody should summon Cats.
The uchiha have a weapon store and a building, which are guarded by cats.
Therefore i say:
Obito should have a cat contract.
It would be funny as well, because Kakashi uses dogs.
The cats would be capable of genjutsus and strong taijutsus (as shown with Nekomata).
Kakashi+dogs and Obito+cats vs madara .
I am not biased at all :y btw .