I was going to say a black CS pet, but yeah... xD
In my opinion any black pet for certain.
I don't have any on my mind off the top of my head, but if there's a regular pet with black and red then that should be it. Even grey works too, really.
I know I'm no help but maybe I'll think of something later. xD
NAMETAGS
Using a nametag will, of course, change the name of your pet.
To transfer a name from one pet to another, you need two nametags.
Select the pet with the name you want to be changed. Tag it to something else.
Then, select the pet you want to have the name from the first. Tag it and name it.
Sometimes it's risky, and you have to be quick about it, but it's the only way to transfer names from pets. Other than tagging a pet and hatching something with the name you want.
Basically Name Tags clear names and make them free for all in the database, as though it's not taken.