On the next run of Gnarwhals going to YoYoExpert there will be one random Gnarwhal that has a Palli Puffin engraved on it. If you are the lucky person who finds that Puffin, you get a Chief. In the box with your Gnarwhal will be the details on how to collect your Chief. The Palli Puffin will be sitting on the nipple inside the hub just like this:
This is not the colorway that it will be on! So I have just helped you eliminate one of them.