*Oh crap I forgot* Has to be done on either Hard or Chaos. Obviously hard just to get it out the way and the mission just needs to be done and boom, should appear in the results screen.
Ahaha indeed. You can get it in the Battle of Yamazaki in Chapter 2. Requirements is 1000 Kills with either Nemea, Guo Jia or Zhang He. Has to be one though so I did it with Nemea. Once you get it, the last guy you killed will drop it.
You can get an Elephant as well. Need to have 1500 kills with either Achilles, Yukimura or Orochi (Regular) in Battle of Hulao Gate (If I spelt it right.).
No matter how much you drop me from the bear Orochi...I WILL save the world with bear.
If you guys got bored, skip around the results screen for bear achievements. The ending has minor spoilers so don't watch that if you ever plan on playing this game.