This ROM hack alters Mario Kart 64's AI, making the CPU opponents more challenging by allowing them to utilize a broader range of items, including shells. The original Mario Kart 64, developed by Nintendo, is famous for its racing, drifting, and item-based gameplay. This modification focuses on enhancing the competitive aspect of the game by changing how computer-controlled players behave, making them more unpredictable and difficult to race against.

Mario Kart 64 CPUs use human items including shells

Mario Kart 64 - Hooting Time 1.3a