- Rider height: 200 cm. (6 ft., 5 in.)
- Rider weight: 125 kg. [275.5 lbs.]
- Ability perimeters:
Punching power: 35 t.
Normal kicking power: 50 t.
Maximum jump height: 60m (196 ft., 10 in.)
Maximum running speed: 100 m. per 5.2 seconds (328 ft. per 5.2 sec)
Sense: x10
Finishing Attack Power: unknown (Amazing Mighty Kick)
This form can also utilize the same powers as Daguba including Pyrokinesis, along with the ability to utilize the Dragon Rod, Pegasus Bowgun, and Titan Sword, all in Rising form. However this ability was never shown along with the Ultimate Form's most powerful attack, the "Ultimate Kick" (アルティメットキック, Arutimetto Kikku), which is the strongest version of his Rider Kick, easily capable of destroying the entire world. In Kamen Rider Decade, Ultimate Kuuga is also capable of the Ultimate Punch (アルティメットパンチ, Arutimetto Panchi) finisher, a punch coated with hot flames. This form was also called the Supreme Warrior (最高戦士, Saikō Senshi).
A form unique to Kamen Rider Decade is Kuuga's Rising Ultimate Form (ライジングアルティメットフォーム, Raijingu Arutimetto Fōmu). Much like Kuuga's other forms that were given a "Rising" upgrade within the original Kuuga, Rising Ultimate is an advanced version of Kuuga's Ultimate Form. In this form, Kuuga has a Rider Kick called the Rising Ultimate Kick (ライジングアルティメットキック, Raijingu Arutimetto Kikku). He also has the flaming Rider Punch called the Rising Ultimate Punch ライジングアルティメットキック, Raijingu Arutimetto Panchi) This form is accessed after Yuusuke has been attacked with the Stone of Earth by High Priestess Bishium, putting him under her control and unleashing all of Kuuga's potential. When Kuuga is freed of Bishium's control, the eyes change color from black to red. This form is used again in Decade: Final Chapter against Doras because of Decade's K-Touch.
- Rider height: 200 cm. (6 ft., 5 in.)
- Rider weight: 150 kg. (330.6 lbs.)
- Ability perimeters
- Punching power: 100 t
- Normal kicking power: 120 t.
- Maximum jump height: 110 m. (360.8 ft.)
- Maximum running speed: 100 m. per 1 seconds (328 ft per 1 seconds)