Future Janemba appears while Gohan is in the Sacred World of the Kais with Future Supreme Kai and Future Kibito. Gohan fights with Future Janemba, and then Future Pikkon appears and fights against the demon as well. Future Janemba is defeated by Gohan and Future Pikkon, though he was toying around with them, and retires.
Super Janemba is described by Future Supreme Kai as being every bit as dangerous as Future Majin Buu, and Ultimate Gohan states that Janemba at Full Power would be capable of defeating him. Future Janemba reforms and gains something akin to a Zenkai after being blown apart by Pikkon, allowing him to surpass even his past counterpart in power and giving him enough power to defeat all of the Z Fighters easily. He was still defeated by Gogeta in the game, however it took almost all of Gogeta's fusion time to do so.
Techniques and special abilities
- Flight – The ability of flight through the manipulation of ki.
- Ki Blast – The most basic form of energy wave.
- Tail Attack – Future Janemba attacks with his tail.
- Dimension Sword – Future Janemba's sword.
- Hell Gate – Future Janemba fires a green mouth energy wave.
- Needle Mountain Hell – Super Janemba shapes a line of bright-white, sharp glass by running his finger through the air. Once he makes the line, it shatters and he fires all the powerful sharp shards at his enemies.