Opposites Attract

Yolei and Kari discover Ken being haunted by visions of the Dark Ocean, and all three are soon drawn into a world of darkness, relying on each other to get out in one piece.

Note: The English video recap for this episode is either unavailable or non-existent.

Synopsis
While searching for Gatomon’s Lost Tail Ring, which may help her become stronger, Kari and Yolei sperate from the group. They run into Ken. Together they enter a dark dimension from the episode His Master's Voice. But Yolei can’t see the Dark Ocean which is only visible to Kari and Ken since they have been there before. They both get uncomfortable. From Ken’s actions they realize he had once been here too. Arukenimon uses this time to set Blossomon on them. Kari has such bad memories from when evil creatures tried to pull her down to kill her she becomes so shaken by this, Yolei has to make Kari snap out of it and together they make Gatomon and Aquilamon DNA Digivolve into Silphymon, destroying Blossomon. The resulting explosion alerts the rest of the DigiDestined, and the two groups are reunited.

Digivolutions
(Number indicates order of occurrence.)