Roboto-Ball was an Arkeyan sport in Skylands. It was mostly played in the Lost City of Arkus. Roboto Ball was once a popular sport among Arkeyans. Their favorite part was that the roboto-balls themselves had the tendency to explode. It made for some exciting action on the field, but it also led to many accidental explosions when these roboto-balls were used at home, which in turn led to property damage and the occasional reveal of hidden treasure stashes.
Bouncer is the most well-known Roboto-Ball player, and the player can make Roboto-Balls appear in Lost City of Arkus and Bringing Order to Kaos!. These are used to destroy certain walls.
Weapon Master says the sport got discontinued in the Lost City of Arkus, although he then says you are permitted to 'play with it'.