This article is about a/an comparison of characters in the Super Sentai and Power Rangers franchises.
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This page highlights the differences between Duke Org Rouki and Zen-Aku.





Duke Org Rouki Zen-Aku
Took control of Shirogane's body and held a grudge with the GaoRangers. Took control of Merrick Baliton's body, plotting revenge on the Wild Force Rangers.
Sealed in a stone coffin for 1000 years. Sealed in a stone coffin for 3000 years.
An Org born of pure evil energy contained in a wolf mask. An Org spirit contained in a wolf mask.
Returned shortly after Shirogane was freed of him, while the GaoRangers were still fighting Ura. Returned to face the Wild Force Rangers again after they had destroyed Nayzor for good.
Killed by GaoHunter Justice and the wolf mask destroyed. Apparently destroyed through defeating the Predazord, reverting Merrick back to normal and the wolf mask destroyed.

Later inexplicably returned but sought redemption rather than continuing his quest for revenge.

The dark energy he was composed of was used by Ura to create increasingly more powerful Orgs before finally using it to take on his Ultimate form. Had no involvement in making stronger Orgs or granting Nayzor his powered-up form.