On Shark Tooth Island if you go on top of the building with a straw roof you will find a spartan. Click on him and this is what he will say:
Yeah, its a reference to Time Tangled Island but why did the Poptropica creators put a spartan on Shark Tooth Island and without telling the players about it? The spartan wasn't always on Shark Tooth Island because he was put their in 2014.