The Fist of the Beast King Roars

The Fist of the Beast King Roars (吠えよ獣王拳, Hoe yo Jūōken) is the nineteenth episode of Digimon Adventure:

Summary
Thanks to Omnimon’s reappearance, the Mega Digimon Nidhoggmon, was finally defeated. However, Sora and the others disappeared after being swallowed by a storm. Taichi and Yamato, who are left behind in the Digital World sneak into Valvemon.