it has the option to use on your pet,but does anyone know what it does to them?

Its a stat booster for your pets is what I was told.

thanks,I was afraid it would change their looks.

Well, for your future reference, there aren't any Christmas-y pet colors (as of yet) and a place like Subeta Lodge or Subeta HQ has lists of pet colors/species.

Thanks, l'll save the info.

This thread : HERE, (Found in the battle forum) may be of help to you.