Besides standard helmets, custom-made ones are also popular in Bali. Various skulls, cats, monsters, Batmans, and of course Germans with horns. I cannot vouch for their safety; they have not been tested, and the 'donor' might be a helmet with the safety level of a bucket. Nevertheless, such shops exist on the island. Suppose you want to put it on a shelf and admire it.
The quality of the products is also not always high.
Helmets are painted in various ways and made in arbitrary shapes.