第4話: 村を守るため進化し火力を得たビヨモン

As the group re-enter the forest, they see a black gear flying above. They soon reach a desert with standing utility poles, and Mimi's compass becomes ineffective due to the presence of metal in the sand. They discover a village of Yokomon in the middle of the desert, and Sora realizes from hearing her partner Biyomon explain to the Yokomon how she assumed her current state that Agumon and Gabumon digivolved into their champion forms to protect their respective humans. They are taken to a nearby water spring but discover that the spring and its source aquifer have dried up with fire shooting up. As it turned out the aquifer is home to Meramon, a fire Digimon who ended up having the Black Gear embedded in his body as he descends from Miharashi Mountain to run towards the Yokomon village in agonizing pain. As the group evacuate the Yokomon residents, Biyomon challenges Meramon but is no match for his power as the Digimon's fire-based attacks are only increasing his size. Luckily, Biyomon evolves into Birdramon and manages to remove the black gear from Meramon's body to restore him to his usual self. As a sign of gratitude for saving their village, the Yokomon invite the group for dinner, but the children discover they cannot eat the food. (Source: Wikipedia)

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