The Battle for Earth

The Battle For Earth is the thirty-ninth episode of both Digimon Adventure and the Digimon anime series.

Summary
With new found strength, the two mega Digimon begin taking on VenomMyotismon. Things seem to be going well until VenomMyotismon is cut open to reveal a powerful energy source, which pushes the Digimon away. But at that point, the kids' digivices shoot beams of light, binding VenomMyotismon, and giving WarGreymon a clear shot at the weakpoint - Myotismon is finally defeated. As things begin to return to normal, everyone's relieved, until the vanishing fog reveals something even stranger in the night sky. It's an upsidedown image of the Digiworld, showing that something is terribly wrong. After rescuing a plane damaged by the image in the sky, the kids decide to head back to the digital world right away to investigate and sort the problem out.