World 5 contains a single Stamp to collect in every level.
As you are riding on Plessie, stay to the right and hop onto the three small platforms. The Stamp will be on the third platform.
After you bounce up from the area with all the Piranha Plants, head to the left to find the Stamp.
Toad required! Hit the Toad switch on the right side of the room to reveal the Stamp!
There is a trail of ants in the large filed. Follow the ants into the hole they are dropping in to find a giant ant with the Stamp on its back.
Double Cherry required! Manage to bring two characters to the end of the level. Hop on the lift to have it take you to the Stamp.
This Stamp can be easily spotted above a row of blocks. Watch out for the spotlight as you jump up to grab it.
Super Bell required! Above the area with the Chargin’ Chucks is a small area with the Stamp. Climb up in your Cat form to reach it.
Enter the tent for a free Stamp!