TurboMan.EXE

TurboMan.EXE is a car-based NetNavi. TurboMan has the ability to transform into a car, similar to how GyroMan.EXE can turn into a helicopter. In MegaMan Battle Network, the Navi ColorMan rigged a bus to explode when it reached its destination. Lan and MegaMan defeated ColorMan to stop the bus from exploding and save Mayl. Both Kai and TurboMan were also in the bus, and they both idolize Lan and MegaMan for their heroic actions.

Game
TurboMan.EXE first appeared in MegaMan Battle Chip Challenge as a playable navi character, his operator is Kai. He and Kai both idolize Lan and MegaMan.EXE. The reason why they enter the tournament, because they want to become a strong net battler just like Lan and MegaMan.EXE.

Although TurboMan.EXE and Kai never appeared or mentioned in MegaMan Battle Network, according to the evidence in MegaMan Battle Chip Challenge, TurboMan.EXE and Kai were actually in the bus where Mayl and Roll.EXE was in (where Ms. Madd is trying to blow up the bus). It's unknown why Kai and him didn't help Mayl and Roll.EXE to stop ColorMan.EXE from blowing up the bus.

Anime
TurboMan.EXE and his operator Kai, never appeared in MegaMan NT Warrior anime. Although, during the car racing episode in MegaMan NT Warrior, the car that MegaMan.EXE was riding look very simmilar to TurboMan.EXE.

Trivia

 * TurboMan.EXE and Ring.EXE were the only new Navis created for MegaMan Battle Chip Challenge and they are both playable characters.
 * TurboMan.EXE was one of the few characters that was never put in the anime.