Shadow

The type is a special type of Guilekai that only appears through the appearance and purification of Shadow Guilekai. These Guilekai have a predetermined appearance while some may have a move, and are obtained by encountering them and using the device on them. Once it has been used, they will be purified, and their move will be replaced by a Pure move.

The Shadow 'Kai use two special stats called Nil (NIL) and Rage (RAG). NIL acts as a stat multiplier and boosts the 'Kai's stats when using a Shadow move, if only for a brief second. NIL only comes into effect if the user calls upon a Shadow move. RAG is the equivalent to EXP, but in this case, it increases NIL by a small percentage. The minimum and maximum NIL is dependent on the Guilekai, but in most cases, the average minimum and maximum is 1.02 and 1.50, respectively. The more the 'Kai battles, the higher the NIL stat increases.

While most Guilekai are able to be purified, there are some creatures that naturally have the Shadow-type embued upon them. These special 'Kai can adopt the type through a process called Inauguration, which can also be accessed by the device. Professors and scientists have noted that these 'Kai have a common origin, in that their upbringing shares instances of traumatic events and unhealthy amounts of negative feelings such as vengeance, hatred, envy, and jealously. They may constantly feel rejected, look emotionally starved, or even be extremely hungry for chaos.