They've even got templates of different sizes for them now Acres. I've got them in a couple different sizes.
Chick-a-roos---I think that if you can combine the stuff here you could come up with a yoyo bunny you like.
Well..............................I couldn't find a bunny pattern but I found
This
http://sunshinescreations.vintagethreads.com/2006/10/how-to-make-yo-yo-friend.html
And this
http://judisdolls.com/bunnyspeedsters/bunnyspeedsters.pdf
Hope it helps!