Although, Kai was never mentioned or seen in MegaMan Battle Network, according to evidence in MegaMan Battle Chip Challenge, he was indeed there, just not seen. Kai was on the same bus as Mayl when Ms. Madd ordered ColorMan.EXE to rig it to explode to get revenge on Lan. However, MegaMan.EXE defeats ColorMan preventing the explosion. It was unknown why Kai didn't use TurboMan to help Mayl and Roll stop ColorMan, during the incident. Though, it is possible that he didn't have enough skill nor courage at the time.
After the incident, Kai sees Lan as an idol and wants to become just like him. So he enters the Battle Chip GP and places first, surpassing Lan.
Kai and TurboMan appears in the Battle Story Rockman.EXE manga by Keijima Jun and Miho Asada, in Volume 4 as contestants in N1 Grand Prix. Although they have won the tournament, they are attacked by BeastMan and Takeo Inukai. Inukai uses dogs to interrupt Kai's operating, leaving TurboMan in a pinch. Lan and MegaMan soon come to their rescue to corner BeastMan, but having severe difficulty after DrillMan joins the fight and gangs up on them.
Impressed by Lan's courage, Kai stands his ground and asks TurboMan to do a counterattack: Reverse Turbo Wheel. This attacks gives MegaMan the perfect opportunity to unleash a strong battle chip attack, thus turning the tables. After GS appears and WWW executes their main plan, Kai and TurboMan are not shown again afterwards. But it is believed after this event, Kai and TurboMan idolizes Lan and MegaMan, just like they did in the game.
- Kai, Mary Towa, and Ring.EXE are the only new characters that were introduced in MegaMan Battle Chip Challenge.
- Kai is one of the few characters that never made it to the anime production.