Digivice

A  is a device used to aid in the Chosen Digimon in their digivolution. Compared to normal digivolution where it is a slow process and takes several years for a Digimon to digivolve if they do it all, the digivice gives the Digimon the power and ability to digivolve to the next level with great ease and efficiency. Unlike normal digivolution however, the Digimon will return back to the rookie form when the need for a higher level Digimon is gone.

Pre-Genesis
Nothing is known of the digivices before the Chosen arrive in the Digital World.

Appearances
The digivice appears in all Season 1 episodes.