Fort Flaptrap

Fort Flaptrap is an island located on Lake Lapcat, the main location of the Bowser's Fury campaign of Super Mario 3D World + Bowser's Fury. It is one of the few islands that surrounds the Lakeside Giga Bell. The island features a castle-like building and Red-Blue Panels, some of which lead to pits of lava.

Cat Shines

 * Bully the Cat Bullies: Obtained by knocking all of the Cat Bullies on top of the tower into the lava pit by using the open spaces created by the Red-Blue Panels.
 * Blue Coin Bustle: A P-Switch can be found somewhere near the island. Once its activated, Mario must collected all of the Blue Coins before they disappear.
 * Five Cat Shine Shards: Obtained by collecting the five Cat Shine Shards laying around the island.

Cat Shine Shard locations

 * Found on one of the Red-Blue Panels in front of the building.
 * Found behind the lighthouse.
 * Found atop a tree near some Fury Blocks.
 * Found hidden behind some trees.
 * Found inside an alcove, which can be entered by destroying a brick block on the side of the building as Cat Mario.

Trivia

 * The mission "Bully the Cat Bullies" is a reference to the mission "Bully the Bullies" from Super Mario 64, in both its name and the mission of knocking Bullies into the lava.