FusionDex

Parts of Arckey's body tint crimson when its temper reaches its boiling point. It lets out sharp cries and swings its limbs through the air to vent this temper, each motion causing the area to tremble from the sheer energy of its raging.

When it starts shaking and its nasal breathing turns rough, it's a sure sign of anger. It is described in mythology as the Pokémon that shaped the universe with its 1,000 arms.