World Castle contains a single Stamp to collect in every level.
Right before the Goomba Tower is a Firebar with a Question Block. Ground pound the block to have it rise in the air, taking you right to the Stamp.
Before you jump of the moving platform, jump to the right to find a small area with the Stamp.
Before the third Green Star is a series of donut lifts. Stay on the left side and jump across to grab the Stamp.
While you are running on the platforms with the arrows, notice a small platform on your left. Jump to it to find the Stamp.
Super Bell required! After you grab the first Green Star, immediately climb up the wall to find the Stamp resting on cloud platforms.
Near the end of the level is a small indention in the wall. Avoid the Rammerheads and enter the indention to find the Stamp.
You’ll see this Stamp under a grate where lava constantly enters and exits. As soon as the lava flows away, sprint to the Stamp, then quickly run out.
Above the area where you hit the switch to bring down the bridge, wall jump to the top to find the Stamp.
Hop into the tent for an easy stamp!
Video coming soon!