Fan:Digivice (Quizardyokai)

A Digivice is a device for the a Digimon Tamer that allows their Digimon to digivolve and among many other features. It can even be upgraded with the use of computers. In  Digimon Crusade Tamers were given their Digivices by a DigiGnome before being taken to the Digital world.

Origin
The first Digivices were created by Lucemon for the humans he brought to the Digital world. Homeostasis/Ophanimon made an improved model of it the children her agents brought to the digital world.

Digivolution
The main function the Digivice is to channel the Tamers emotions turning it into energy to allow their partners to Digivolve.

Champion
To have their partners digivolve to their Champion forms Tamers must have either strong emotions for their partners or have a fighting spirit.

Ultimate
To have their partners digivolve to their Ultimate forms Tamers must first activate their Crest by finding their own resolution which will align with their virtue (or vice).

Mega
For a Digimon partner to digivolve to their Mega forms they must first absorb a power of a Mega-Level Digimon and find their own resolution.

Transcendent
To have their partners digivolve to their Transcendent forms must upgrade Digivice to allow transcendent evolution.

Armor
For a Digimon partner to digivolve to their Armor forms they must gain a Digi-Egg by showing that their virtues aligning with the egg.

DNA Evolution
With a Helix Loader a Tamer can have their partner perform DNA Evolution which involves two Digimon fusing into one.

Modification Cards
Tamers can use Modification Cards to give their Digimon partner boosts in battle. They can gain cards by scanning a Digimon's Matrix or even trade cards with other Tamers.

Communication
Tamers can communicate with their partners and even other Tamers if they're close enough.

Radar
Digivices have radars that can detect other Digimon and Tamers at a 100 yard radius.

Scanning
A Tamer can scan a Digimon's Matrix purifiying them. The Cores are stored in the Digivives while the Fractal Code is used for making Modification Cards.