(Japanese: 激闘! それぞれのバトル!!Fierce Fighting! Respective Battles!!) is the 78th episode of Diamond & Pearl. It first aired in Japan on May 8, 2008 alongside DP077 as part of a one-hour special.
After everyone has safely passed the first round of the Wallace Cup, the group returns to their hotel at the Lake Resort and talks about their respective journeys. Afterwards, Ash takes a walk near the lake with Pikachu when suddenly, something in the center of the lake begins to glow, and the shadow of a creature emerges. However, when Ash tries to approach it, the shadow disappears again.
After this strange experience, Ash returns to the hotel and talks to Dawn and the others about the legend revolving around the lake.
The next day, the second round of the Wallace Cup begins...
Spoiler warning: this article may contain major plot or ending details.
It is speculated that Ash is going to encounter Azelf, similar to Dawn's encounter with Mesprit in Following a Maiden's Voyage, and was confirmed in the episode.