Acnologia

200% boost to Atk and 100% boost to Def, max HP of Dark types, hugely boosts Spark damage, damage taken may considerably restore HP, 15% damage reduction from Fire, Thunder, Light and Dark types & 50% Spark damage reduction

Adds Def ignoring effect to attacks for all allies, probable damage reduction to 1, negates all status ailments and Atk, Def, Rec reduction effects, damage taken may restore HP & 10% damage reduction

BB

Black Dragon's Roar Lv. 4

1 DC30

20 combo powerful Dark attack on all foes, boosts own max HP, damage taken hugely boosts BB gauge for 3 turns, damage taken may considerably restore HP for 3 turns, adds probable 2 turn Atk, Def reduction counter for 3 turns & negates critical and elemental damage for 3 turns

SBB

Black Dragon's Roar Lv. 5

1 DC5

23 combo massive Dark attack on all foes (enormously boosts own critical hit rate, damage relative to remaining HP), 5 combo powerful Light, Dark attack on single foe, enormously boosts Atk, Def relative to max HP for 3 turns, enormously boosts Spark damage for 3 turns, probable huge 2 turn Atk, Def reduction & elemental and critical vulnerability infliction for 2 turns

UBB

Black Dragon's Roar MAX

1 DC35

28 combo massive Dark attack on all foes (enormously boosts own critical hit rate, damage relative to remaining HP), 5 combo massive Fire, Thunder, Light, Dark attack on single foe, enormously boosts Atk, Def relative to max HP for 3 turns, enormously boosts Spark damage for 3 turns, enormous 3 turn Atk, Def reduction & damage taken enormously restores HP for 3 turns