What the set pays
There are 15 shiny stars. Three are in the spawn lobby and two are on each of the six later islands. Stars can be collected in any order. A collected star goes faint or disappears for you. It does not respawn.
The recorded full-set reward is a permanent 4 percent shiny mutation buff on hatches. A second description says the full set unlocks direct rainbow hatching. Keep both in mind and read the confirmation on your profile. Individual stars are not described as granting a partial buff.
Spawn lobby (3)
- Behind the fountain and rocks by the leaderboard, near the gold machine, along the perimeter wall.
- Behind the Spiked Egg stand, after the drawbridge, against the back of the casing.
- On the rocket-pad tower at the far back platforms, on the right support column near the secret leaderboards.
Sky, Autumn, and Mushroom (2 each)
Sky Island. Immediately left of the portal entrance, against the border. Then on the outer cliff to the right of the egg stands.
Autumn Island. On the grass beside the Gem Upgrade vendor, where the Invisible Toilet stands. Then behind the tree on the Giant Pumpkin sub-island, between the shrine path and the gem upgrades.
Mushroom Island. Behind the Pet Index machine and the nearby tree. Then on the side island with red and purple mushrooms, behind the chest and foliage on the left.
Desert, Crystal Cave, and Shadow Realm (2 each)
Desert. Behind the Gold Machine to the right of the pyramid. Then at the rear-right stone corner of the pyramid where it meets the boundary rocks.
Crystal Cave. On the rocky ledge to the right of the eggs, by the glowing purple tree. Then behind the rock clusters at the back of the Diamond machine.
Shadow Realm. Against the dark crystal behind the Enchanting machine, on the left. Then behind the standalone crystal in the gap between the Rainbow machine and the enchanting area.
You need the island unlocked before its stars are reachable. Extra jumps help on the cliff and side-island spots. The island pages list the portal costs.