Here is is, ready to kill someone over the sweater he got for Christmas.
Ka-Klik!

That appears to be a Netherlands Dwarf, whereas Bun Bun is a mini lop. They're two totally different breeds of rabbits. Although if Bun Bun was one of these and he followed the general temperament difference between the two breeds he would be even more Bun Bunish than he currently is. Seriously with a few exceptions the smaller the rabbit the more ill tempered it is. I used to raise a breed known as Flemish Giants, they were 14-20 pounds when fully grown and they had about the most laid back personalities imaginable. The rabbit pictured, a Netherlands Dwarf was generally a rabbit that you didn't want to handle without being very careful.