An anthropomorphic tennis ball with legs. Clumsy, yet very smart. He's able to build machine, mechanisms and all the like quickly, and loves helping. A huge nerd, who likes making discoveries. Works under Golf Ball, one of his best friends. He's also worked with Firey, Coiny, Gelatin, Fries, Blocky, Basketball, Grassy, Robot Flower, TV and 8-Ball. Also friends with Pen, Eraser and kind of Puffball. If he wants to do something but thinks Golf Ball will disagree, he gets others to do it for him.