The Power Rangers franchise is absolutely overflowing with villains. After all, almost every episode introduces a new one, who the titular heroes almost inevitably defeat. With such a high turnover of villains, it takes a lot for any one of them to be remembered and stand out from the rest.

Related: 10 TV Shows You Didn't Know Had Comic AdaptationsHowever, there were some villains that not only stood the test of time but have even been more well remembered than the heroes they fought against. From the main antagonists to their minions, these villains may have lost the fight against the Rangers, but won over the hearts of the audience.

10 Ivan Ooze Only Appeared Once, But Has Not Been Forgotten

Ivan Ooze in the 1996 Power Rangers movie

Ivan Ooze was the main villain of The Mighty Morphin' Power Rangers: The Movie. Introduced shortly after much of the original cast had been replaced with new Rangers, Ooze had surprising staying power. Of the characters introduced in the movie, Ooze is undoubtedly the best remembered.

This is likely due to the fact that Ooze came the closest to defeating the Power Rangers at that point in the series. Not even Zordon had the power to help the Rangers, and they had to seek a new source of power to defeat him. This accomplishment made Ooze stand out from the other villains in the original seasons, who are already some of the best in the series.

9 Shunned By Society, Ransik Turned To Evil

Ransik Time Force Power Rangers Villain

Despite the series being full of clichéd characters, Power Rangers rarely had sympathetic villains. The main antagonist of Power Rangers Time Force, Ransik is one of the exceptions. Mutated by a chemical accident and viewed by society as a freak, Ransik lashed out not only at his world but across time itself.

In the end, Ransik had a change of heart after he nearly killed his daughter during a fight with the Time Force Rangers. When his daughter was able to show him that not all humans were filled with hate, he willingly turned himself in to face justice.

8 Koragg, The Knight Wolf Had What Most Villains Lacked: Honor

Koragg The Knight Wolf Power Rangers Mystic Force Villain

Power Rangers Mystic Force is unique among the series because of its focus on magic and fantasy, whereas most Power Rangers seasons are based on sci-fi and martial arts. One bonus of the fantasy elements is that Mystic Force could lean heavily on fantasy character tropes. Koragg, The Knight Wolf was a fearsome yet honorable evil knight who fought against the Mystic Force Rangers.

Related: 10 Forgotten Toylines That Were Worth Every PennyHis honorable nature came from him being the husband of Udonna, the Rangers magical mentor, trapped under an evil spell. Even while holding back due to his honor and fighting against the spell from the inside, Koragg posed a major threat to the Rangers. After being freed from the spell, he joined the Rangers as the Wolf Warrior Ranger.

7 Astronema Added Drama To The Space Rangers Dynamic

Power Rangers in Space - Astronema with purple hair hiding beside a boulder

Astronema from Power Rangers in Space was the kidnapped and brainwashed sister of Andros, the red Space Ranger. She served as one of the final main antagonists of the Zordon Era, alongside her evil mentor Dark Specter. A master manipulator and skilled fighter, Astronema actually managed to defeat the Power Rangers and nearly conquered the Earth.

However, Andros never lost hope that his sister was fully lost, and in the end was unwilling to fight her, choosing instead to go along with Zordon's plan to sacrifice himself and cleanse the universe of evil, saving Astronema in the process.

6 Scorpina Has Enjoyed A Renaissance Of Popularity

Scorpina MMPR Villain

Scorpina already had a claim to fame by playing a major part in one of the original Mighty Morphin' Power Rangers' best arcs "Green with Evil." which introduced Tommy Oliver as the Green Ranger. Scorpina seemingly faded into Power Rangers history over the years, until the late 2010s, when she found new life in the pages of Boom! Studios Mighty Morphin' Power Rangers comics.

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10 Weakest Power Rangers In The Franchise, RankedScorpina played a large part in the "Shattered Grid" Arc, as well as being the main villain of the "Soul of the Dragon" graphic novel. She holds the rare status of a villain who wasn't the main antagonist that hasn't been forgotten by fans or creators. She's even had her fair share of character development.

5 Dai Shi Was Really Two Villains In One

Dai Shi Power Rangers Jungle Fury Villain

The spirit of an ancient, 8-headed Chinese dragon Dai Shi was the main antagonist of Power Rangers Jungle Fury. For most of the series, he resided in the body of Jarrod, a former student of the order who had protected against his return. Arrogant and hot-headed, Jarrod became angry when he wasn't selected to guard the chest that had trapped Dai Shi. Lashing out at his master, he accidentally killed him and unleashed Dai Shi.

Dai Shi was not fully in control of Jarrod, and his ultimate fear was that Jarrod's true good nature would overpower his evil and cast him out. Audiences got to experience both Jarrod and Dai Shi's villain stories and their ambitions, giving the story greater depth. In the end, they also got the catharsis of Jarrod's redemption, as he played a major part in destroying Dai Shi forever.

4 Venjix Might Be The Scariest And Most Competent Villain

The Venjix red power light In Power Rangers RPM

Power Rangers RPM is the darkest entry in the series, which is surprising considering the Japanese series it's based on is lighthearted by comparison. RPM features a dystopian world, where the Earth has been reduced to a wasteland by the supercomputer Venjix and his army of machines and all humanity has retreated to a single city, Corinth, protected from the environment by a dome.

Related: The 10 Most Immature Characters In Power Rangers, RankedVenjix has all but won at the start of the series, and only Corinth remained to stand against him. While seemingly defeated at the end of RPM, Venjix was never actually completely destroyed. He survived within one of the Morphers, ironically created with his own technology. The final shot of the series was the Morphers blinking with his same, ominous red light.

3 The Psycho Rangers Were Brutal

Power Rangers - The Psycho Power Rangers standing in formation with the red ranger in the centre

Power Rangers in Space introduced the Psycho Rangers, an incredibly dangerous evil team of Rangers. Created by Astronema and Dark Specter from the remains of their enemies, the Psycho Rangers were the exact opposite of the Space Rangers, able to perfectly counter the fighting style of their counterparts.

The Psycho Rangers absolutely demolished the Space Rangers in their first appearance, and after being revived, easily defeated the Lost Galaxy Rangers. It took the combined efforts of both Ranger teams to defeat the Psycho Rangers. The Psycho Rangers also have the distinction of being one of the most prolific evil Ranger teams, as most evil or copy ranger teams are only featured in a single episode or arc, while the Psycho Rangers have appeared across multiple seasons.

2 Lord Drakkon Has Become A Fan-Favorite

Lord Drakkon in Power Rangers comics from Boom Studios

Lord Drakkon is perhaps the most popular Power Rangers comic book villain. An alternate version of beloved Ranger Tommy Oliver who never rejected Rita Repulsa's evil, he instead usurped her, beat the Power Rangers, and combined the power of the White and Green Power Rangers to become the evil Lord Drakkon.

Lord Drakkon was ultimately defeated, but only by a mass effort of all the Rangers across the multiverse. After attempting to take control of the Morphing Grid and take the power of every Ranger and conquering multiple dimensions, Lord Drakkon died when his attempts to control the Grid resulted in the destruction of his "perfect world."

1 No Villain Will Ever Top Lord Zedd

Lord Zedd, a major villain in Mighty Morphin Power Rangers

Lord Zedd was the husband of Rita Repulsa, the original Power Rangers villain. His arrival took the series in a new direction, where the monsters were stronger, the villains were bigger, and the Rangers would need new power to stand against him.

When even Rita and her minions, the series' main antagonist up to this point, were scared of his return. Audiences knew that Lord Zedd wasn't playing around. He even managed to successfully destroy the Dinozords, though he was defeated by the Thunderzords. Zedd stands apart from other Power Rangers villains in that while he was defeated time and again, he never lost his original intimidating presence.

Next: 8 Harsh Realities Of Being A Power Ranger