I know it's possible, I've had several robot zaps over the years! But it is rare, very rare! If you have premium you can change your pet's color yearly I believe but as I never have had premium I don't really know the details. Other than that, there is the Holiday giveaway but there are so many that apply each year that the chances of you getting the pet/color that you asked for are very slim. But it's worth it to participate, you never know!