It Came From The Other Side
Season 3, Episode 4
After a bit of work, Gargomon manages to de-digivolve. The next day, Henry and Takato are challenged by Gorillamon! Henry doesn't want to fight, but he is forced to. The secret of Terriermon's origin is revealed! Henry remembers when he helped Terriermon defeat Gorillamon in the Digimon game, and repeats it in real life.