Digimon: Digital Monsters Season 3 Episode 6 Family Picnic

Mimi and the new DigiDestined have a picnic in the Digital World. But Mimi falls into a hole and, along with Yolei, is separated from the rest of the DigiDestined. They meet Palmon, but are then attacked by the Roachmon brothers, Gekomon and Otamamon, who are under the Digimon Emperor's control.