Devil's Seven (Truth and Ideals)

The Devil's Seven, or more properly known in the canon proper, Nihilego, Buzzwole, Pheromosa, Xurkitree, Celesteela, Kartana, and Guzzlord, are the only intended appearances of the canonical Ultra Beasts in Truth and Ideals solely because their depictions here are the most unhinged, graphic, and darkest aspect of their actual selves solely due to the context of how they all appear; they are visions that serve as the literal destruction of N's inner world breaking apart around him, and while all seven species exist in the canon proper, they don't physically appear and instead physical appearances of Ultra Beasts are left towards the fan-made designs. The term "Devil's Seven" refers to the fact they all refer to themselves as a single entity; an incarnation of N's mind as nothing more of the reality of what he was towards Team Plasma as depicted by the Ultra Beasts; nothing more than a puppet king for Ghetsis to lead behind and exploit, in which Ghetsis himself is represented by a fusion of a twisted rendition of N himself and a Nihilego which serves as the "Motherbeast" of the whole swarm that appears. Their shared name originates from the music played while planning out and writing the scene itself; a remix of the Yellow Devil's theme as used for Mega Man: Powered Up. All seven of them appear exclusively within Chapter 60: Unforgiving Cold.