Omegazelle (Ryuki)

Omegazelle (オメガゼール): A Gazelle/Water Buffalo-type Zelle. It used a staff in battle. Targeted Shinji and Ren while they were unable to transform in episodes 24-25, before being destroyed by Ryuki's Dragon Rider Kick. Another appeared in episode 39 leading a pack of Gigazelles until it was destroyed by Ryuki Survive's Dragon Firestorm.

Kamen Rider Decade
One is briefly seen fighting Kamen Rider Ryuki alongside GuldThunder and Zebraskull Bronze.