No Whamon

The DigiDestined escape Seraphimon's castle, but are forced to fight when their path ends in a cavern, and Grumblemon makes his last stand against them.

Summary
Escaping from 's castle, Trailmon (Kettle) brings the children to an underground cavern, and takes Seraphimon's egg from Zoe to properly hatch it. Unsure of where they are, the children begin to look for a way out, but they only find a large, icy cavern with a pool in the center. The group begins to look for an exit, but suddenly a appears from the pool and is uncharacteristically out of control. Koji and Takuya both spirit evolve to calm down Whamon. Zoe asks him what's wrong and Whamon tells them about how he was trapped in the cavern after stole some fractal code that resulted in part of the ocean being sucked into the cavern.

Grumblemon, having seen Kettle head back toward Seraphimon's castle and backtrack the way he came, appears and uses more magic to create a small army of. , who was hidden, grapples and, taking them out of the fight and beating them. No longer able to stand on the sidelines, Tommy and J.P. spirit evolve. J.P., however, was accidentally injured by Whamon when he was thrashing around and is quickly defeated. When Grumblemon moves in for a finishing blow, Whamon attacks, incidentally releasing the B Spirit of Thunder that he accidentally swallowed. J.P. beast spirit evolves to MetalKabuterimon and is initially completely out of control, blasting the cavern around them and defeating Arbormon as Petaldramon. JP gains control over his Beast Spirit and turns on Grumblemon and the last Golemon. With one shot, JP destroys both Grumblemon and Golemon and gets Grumblemon's Human Spirit while returning Zoe's to her. However, the cave begins to collapse due to damage it took and water rushes in. Whamon takes the group into his mouth and returns to the ocean, ferrying them to an island as thanks.

Quotes
"Hmph. Thou should take care speaking of Grumblemon when thou has yet to find their own Beast Spirit."
 * — Mercurymon states Ranamon's irony.