Enables swimming through walls in certain underwater sections.

The defining feature of this ROM hack is the inclusion of , Mario's sentient hat partner. Unlike the original Super Mario World , where Mario relied on power-ups like the Fire Flower or Cape Feather, this version grants players a suite of versatile movement and combat options from the start:

While the hack utilizes the original world map and many familiar level layouts, the inclusion of Cappy fundamentally alters the difficulty.

Players can throw Cappy and then jump off him, using the hat as a temporary platform to reach high or distant secret areas.

This is the hack's "hook." By throwing Cappy at specific enemies or objects, Mario can "capture" and take direct control of them, gaining their unique abilities to solve puzzles and traverse levels. Capturable Entities and Abilities