Infinity Mountain

From Thread 1

The central point of File Island, few Digimon live on it. It is one of the largest and tallest mountains in D-World Gamma. Its peak is well above the cloud line and is constantly covered in snow.

Accroding to the anime, Digimon Adventure, Devilmon had once took residence on the mountain top after he found the Black Gears within it. The first visit marked Gomamon's first evolution into Ikkakumon. The second visit, when the Chosen Children fought Devimon, marked Angemon's first appearance and Devimon's defeat. The mountain was apparently also home to a Unimon that assisted the Chosen Children in the fight against the Dark Masters.

In the video game, Digimon World, Infinity Mountain was labeled Mt. Infinity. There are four bosses in Mt. Infinity: Devimon, Megadramon, Metal Greymon, and Machinedramon.