I just dont think it would ever have occured to them to add it. As others have mentioned they existed for a reason on the toys - an add on to help point out a specific location. The cartoons were simply adverts to promote the line - they are adorable (at least I think so
) but they are not exactly accurate all the time. So much of the media associated with G3 (books, shows, etc) is a little random...or tweaked to suit a story line.