Jump over the seals and push them both to the left side of the rock. It will tilt and you can get the map.
When you get to the rock. jump on top and push both seals to the left side.
You can not move it.
You have to move the seal that is on the right all the way to the left and just click on it
you can not. you have to go in it.
Tilt the rock by moving the seals to the left side. You can now retrieve the paper, which is a map to the Time Capsule on Big Nate island.
It needs to be dark
Move the seals at the left side and go under the rock
It's under a rock on a small island off Puffin Point (far right of the island). You need to look through the telescope to see it before going out. Beat Nate on the Jet Ski Race and move the seals left to get under the rock.(see related question)
You do not play as Big Nate. He accompanies you around most of the island, and races you on the jet skis.
You can't play "as" Nate, but everywhere you go on the island, he tags along.
you dont
There is no Duke among the characters of Big Nate island.