Stream anime episodes online for free, Watch Digimon Frontier Episode 20 English version online and free episodes. Anime Episode guide, Chapter Digimon Frontier Episode 20 English dubbed From Dawn To Duskmon The Legendary Warriors travel into the Dark Continent and are confronted by Arbormon who slide evolves to Petaldramon. Petaldramon eats a tree and grows to a massive size. Digivolving to their Beast forms, the kids fight him, but he proves to be incredibly strong. Finally, after some teamwork, Petaldramon is defeated by a combined attack from Zephrymon and BurningGreymon although Lobomon gets his Beast Spirit. Duskmon shows up and destroys Arbomon as he is now useless without his Beast Spirit.