December 21, 2012
Taichi and Yamato argue whether they should climb Infinity Mountain. Joe and Gomamon decide to climb the mountain by themselves. While on the mountain, they are attacked by a Unimon. Taichi and Sora come to the rescue, and Gomamon evolves into Ikkakumon to save Joe from falling after Unimon bucked him off and destroy the Black Gear that was controlling Unimon.