Ep. 7: Joe and Gomamon face Unimon on Infinity Mountain while Tai and Sora arrive to help
Aired on April 18, 1999

Joe and Gomamon choose to scale Infinity Mountain independently after Tai and Matt debate the merits of the climb. During their ascent, they encounter an attack by Unimon. Tai and Sora intervene to assist the pair. In the ensuing conflict, Gomamon evolves into Ikkakumon to prevent Joe from falling after being bucked off the creature. Ikkakumon subsequently destroys the Black Gear controlling Unimon. Following the battle, the group reaches the summit and discovers that their location is an island.
Episodes
- Ep. 3 · Garurumon Evolves to Defeat Seadramon After Tai Accidentally Provokes the Beast
- Ep. 4 · Biyomon Gains Firepower After Evolving to Save the Village
- Ep. 5 · Kabuterimon's Electro Shocker
- Ep. 6 · Togemon battles Monzaemon in Toy Town to free captured children and Digimon
- Ep. 7 · Joe and Gomamon face Unimon on Infinity Mountain while Tai and Sora arrive to help
- Ep. 8 · Leomon and Ogremon attack the children while Devimon creates an illusionary mansion trap.
- Ep. 9 · Tai and Agumon defeat Frigimon to clear Black Gears and help Matt and Gabumon cross the island.
- Ep. 10 · Mimi and Izzy face attacks from Centarumon and Leomon while seeking answers in the labyrinth.
- Ep. 11 · Joe and Sora face Lord Bakemon after meeting Ogremon at sea