Acnologia

150% boost to Atk and 80% boost to Def, max HP of Dark types, hugely boosts Spark damage, damage taken may restore HP & 10% damage reduction from Fire, Thunder, Light and Dark types

Adds Def ignoring effect to attack for all allies & probable damage reduction to 1

BB

Black Dragon's Roar Lv. 1

1 DC28

16 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

SBB

Black Dragon's Roar Lv. 2

1 DC5

19 combo massive Dark attack on all foes (enormously boosts own critical hit rate, damage relative to remaining HP), 4 combo powerful Light, Dark attack on single foe, enormously boosts Atk, Def relative to max HP for 3 turns, hugely boosts Spark damage for 3 turns & probable huge 2 turn Atk, Def reduction

UBB

Black Dragon's Roar Lv. 3

1 DC33

22 combo massive Dark attack on all foes (enormously boosts own critical hit rate, damage relative to remaining HP), 4 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