Ball 'n' Chains are obstacles/enemies that appear in New Super Mario Bros. Wii. They are spiked balls on chains spinning in a 360 degree circle on a block. The spiked ball can damage Mario if he touches it. Mario and the gang could stand on the block. This cannot harm them. Ball 'n' Chains are found in fortresses and castles. It is impossible to destroy a Ball 'n' Chain.