In Sonic Free Riders, E-10000 O robots appear as CPU opponents. They, along with the other E-10000 units from the Relay Races, do not appear in the World Grand Prix mode, so they are not featured in the game's story. Instead, they are only encountered in said Relay Races, where a trio of them compose TEAM E-10000 O.
Powers and abilities
Designed as Extreme Gear jockeys, the E-10000 O robots specialize in Extreme Gear riding, and are capable enough to compete against the world's best Extreme Gear riders.
The E-10000 O robots' equipment of choice is an E-GearExtreme Gear. The E-Gear is a Board type Extreme Gear that has been developed as a frictionless terrain traversal option for the E-10000 series, and reflects Dr. Eggman's taste.
In Sonic Riders, similarly colored robots resembling the E-10000 series appear as obstacles in Ice Factory. They will attempt to freeze any nearby players, but are easily able to be knocked out of the way. These unnamed robots are larger than E-10000 O and have several design differences, such as their snow cannon arm.
↑In Sonic Free Riders, the E-100000 Os does not appear as individual opponents. However, three units of them appear as a team under the name "TEAM E-10000 O". With their team name mimicking the naming traditions for other canonically named E-10000 units, it stands to reason that this particular E-10000 model is named "E-10000 O".