Museum-Quality Egg

The Museum-Quality Egg is a treasure found in. It is actually an Easter egg.

Collecting the treasure
Once you arrive at the area with multiple platforms and a Mockiwi on top, go right and you will find another Mockiwi. Once it is killed, move to the Hydroe bramble, but don't touch it, and use the jetpack to fly over it and collect the treasure. Fly back using the jetpack.