Ultra Duark is the second evolution of Duark.
- Attribute: Darkus
- Power: 1100Gs
- Owner: Kurai
Duark is alot larger than before. Although he's not Aquos, he has a little blue in him. He is also white but he's not Haos either.
- Darkus Striker: + 700 Gs to Duark - 600 Gs from opponent
- Dark Explosion: - 300 Gs from opponent +500 Gs to Duark
- Good Copy, Bad Copy: Allows Duark to make 4 clones of himself + 550 Gs
- Destruction Impact: Paralyzes opponent for the next attack and + 700 Gs to Duark.
- Darkness Power: Allows Duark to use any of the opponents abilities
- Energy Shift: This ability takes away half of the opponents Gs if they have 200 more Gs then Duark
- Most people believe this will be Duark's final evolution, but he will evolve even further later on (example: Maxus Duark).
- Since Duark was created by energy from the Perfect Core and the Doom Dimension, he is very unusual.
- He is the one of the only bakugan that has more than 200Gs more when he evolves (not counting Maxus bakugan).