According to the official Pokemon.com pokedex, Ditto has four abilities.
These are: Torrent, Blaze, Overgrow, and Shield Dust.
I know that it might be due to Transform, but I don't think that Wild Ditto hae these abilities.
Link!EDIT:
After looking at some more Pokemon, I realized that all of them have the same four abilities...
If you don't believe me, just choose Arceus from the list.
(it's at the bottom.)
_________________Anger
, initiate death.
Love
, initiate instant awesome.
Kill
, initiate brutal murder from me...