|This character exists primarily or exclusively within the Sonic X anime or comic continuity.|
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.
E-21 Ballios is a mass produced athletic robot built for playing baseball.
A team of Ballios challenge Sonic the Hedgehog and co. to a game, the winner of which gets a Chaos Emerald. They were beaten and some were destroyed, the rest managed to escape in a helmet shaped ship from where they were deployed. A Ballios is 120 cm (4 ft) tall and weighs 120 kg (264 lbs).