|First appearance||Day and Nightmare|
|Battle Gear||Silver Darkus Axellor|
Nightmare is a Pyrus Bolcanon and Mel's Guardian Bakugan. His evolution is Nightmare Bolcanon, a corrupted evolution of Bolcanon.
The fast-shooting action of his enormous claws is unique to Bolcanon. The terrifying spikes that rest on his shoulders cause devastating damage to his opponents. His mouth opens wide to shoot out hot lightning magma that his enemies fear. He is later turned into Nightmare Bolcanon.
Nightmare is a ferocious and savage Bakugan. He fights very aggressively, showing no mercy to anyone.
- Pummel Bouler:
- Harlow Warrior (Karlaf Warrior/Nega Warrior):
- Death Metal Army: