King Ka-Thunk's Castle is a level of World 5 in Super Mario 3D World.
- Green Star 1: Near the first Warp Box, Jump through the Green Star Ring and collect all eight coins to get the star.
- Green Star 2: In the third row of Ka-thunks, Jump through the Ka-thunk to get the star.
- Green Star 3: Near the Warp Box leading to the boss battle, be in Cat form to climb up the wall and get the Star.
StampIn between the second and third row of falling Ka-thunks, Be in Cat form to Climb the wall and get the stamp.
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