Hydreigon

DarkDragonDark Aura

Level-up moves 9

Lv	Move	Type	Cat	Pow	Acc	PP
100	Nasty Plot Phase 1 rotation Thinks bad thoughts to sharply boost Sp. Atk.	Dark	Stat	—	—	20
100	Dark Pulse Phase 1 rotation Attacks with a horrible aura. May cause flinching.	Dark	Spec	80	100	15
100	Dragon Pulse Phase 1 rotation Generates a shock wave to damage the foe.	Dragon	Spec	85	100	10
100	Flamethrower Phase 2 rotation A powerful fire attack that may inflict a burn.	Fire	Spec	90	100	15
100	Earth Power Phase 2 rotation Makes the ground erupt with power. May lower Sp. Def.	Ground	Spec	90	100	10
100	Dark Pulse Phase 2 rotation Attacks with a horrible aura. May cause flinching.	Dark	Spec	80	100	15
100	Surf Phase 2 rotation Creates a huge wave, then crashes it down on the field.	Water	Spec	90	100	15
100	Dark Pulse Phase 3 rotation Attacks with a horrible aura. May cause flinching.	Dark	Spec	80	100	15
100	Draco Meteor Phase 3 rotation Casts comets onto the foe. Harshly lowers the Sp. Atk.	Dragon	Spec	130	90	5

* a legal move, just moved to level-up · ** new to this game

This game's documentation doesn't publish TM compatibility, so none is listed here.

Area	Method	Level
Area 1 — Pseudo-legendary guardians	Boss (choose one of the group)	90–99, scales

One of the 10 pseudo-legendary guardians of Area 1, the first area of every run. Fights in 3 phases, restoring to full HP at each phase change.
Its ability, Dark Aura: Boosts Dark moves.
Innates switch on as your boss count grows: Levitate (Not hit by Ground attacks.) — from your 2nd boss win; Pressure (Raises foe's PP usage.) — from your 4th; Dragon's Maw (Ups Dragon-type moves.) — from your 6th.
Reward for beating it: the ability Dishearten (Lowers the foe's Sp.Attack.).