Basquash!

On the planet Earthdash, the infrastructure is crumbling and everyone wants to escape to the technologically advanced lunar city of Mooneyes. Unfortunately for young Dan, who dreams of taking his disabled sister to the moon for medical treatment for her paralyzed legs, only their societies' most elite are allowed to leave the planet. Dan's big chance comes when he crashes a game of Bigfoot Basketball, which is played with giant robots, and accidentally revolutionizes the sport. Taking the game to new heights of mayhem and destruction, he gains fame but not fortune or a trip to the moon. Instead, he'll have to fight his way to the top of a radically changed game while solving a mystery that could affect the future of the entire planet. (Maiden Japan)