This article is about a/an villain in Power Rangers Dino Thunder.
Crystal Clear User.png This character is also known as the adoptive father of Trent, Anton Mercer

"Find him. Whatever it takes."
―Mesogog's first words when addressing the Tyrannodrones (whilst in shadows) and ordering them to find Tommy.[src]

"You destroyed my plans of creating a perfect world. However, I was able to absorb enough Dino Gem energy to complete my transfiguration. Witness the face of your final battle."
―Messogog's final speech before turning into the Meso-Monster.[src]

Mesogog was a humanoid dinosaur-like being and the main antagonist of Power Rangers: Dino Thunder. He was the monster-form of Anton Mercer. Mesogog was both the sworn enemy of the Dino Rangers and a psychopathic and sinister terrorist that wanted to conquer the world and return it to the era of dinosaurs.



Anton Mercer was on the verge of a scientific breakthrough during an experiment involving dinosaur DNA, when he was accidentally transformed into Mesogog, an evil mastermind with plans to revert the earth to the age of dinosaurs and turn the human race into reptilian creatures like himself.

Mesogog punishing Zeltrax and Elsa for their failure

Mesogog and Dr. Mercer have distinct personalities, but share the same body in a Jekyll-Hyde relationship. Each is aware of the other's existence, but also dislikes the situation. In his Mesogog form, he is equipped with cybernetic technology and psionic powers that he uses to torture his enemies, or his allies when he is angry at their failures.

Dr. Anton Mercer has an adopted son, Trent Fernandez, who became the White Dino Ranger when he accidentally discovered Mesogog's lab while investigating his father's mysterious comings and goings.

Mesogog's Grand Plan

In his world domination attempts, Mesogog is assisted by two servants, Elsa, and Zeltrax, a cyborg whom Mesogog created à la Dr. Frankenstein from the ruined body of Tommy Oliver's former associate, Terrence "Smitty" Smith. Mesogog also controls an army of cybernetic dinosaurs called Tyrannodrones which were originally created by Tommy and Anton.

Mesogog, Elsa, and Lothor in Mesogog's lab in PRDT Thunder Storm

Mesogog, like Vexacus and Shimazu, originally hated Lothor and believed him to be an incompetent idiot. Elsa agreed and was quick to refer to Lothor as a buffoon. For some reason, Mesogog believed his first assault on Reefside would be credited to Lothor. It was never revealed if somebody actually suspected Lothor was involved with that. Mesogog eventually overcame his prejudices and teamed-up with Lothor when he discovered that he had "Evil Power Rangers". Mesogog was not fully allied with Lothor, because he did not trust him completely. When Lothor and Mesogog's team-up idea failed, Mesogog betrayed Lothor and shrunk him inside of a jar to add to his collection of experiments. (Lothor and his jar were presumably destroyed with Mesogog's lab at the end of the series.) However, Mesogog had previously told Elsa he already intended to get rid of Lothor even if the team-up resulted in a success.


Eventually Mesogog freed himself of his humanity by using a potion to separate out Dr. Anton Mercer. As a result, his insanity and determination increased. He also rid himself of Elsa when needing an energy supply to power his cannon. It took a bit of deception from the Rangers (using the Dino Gems as bait) to destroy the cannon and Mesogog's base. He would later reappear after the Zords were destroyed as well as after Zeltrax's death and Zelzord's destruction, absorbing enough energy from the Dino Gems to survive the explosion and 'evolve' into a self-replicating dinosaur-like monster, known as the Mesomonster. The Mesomonster was far stronger then any other opponent the Dino Thunder Rangers had faced, even surviving the Triasic Batalizer's Battle Blast before replicating. With no options left, the Rangers combined all of thier Dino Gem energy to form a T-Rex of pure golden energy. With the Rangers holding the four Mesomonsters in place with beams of golden energy, the Rex charged forth and munched down on the monsters. The Rangers spun around and posed as the Rex exploded behind them, taking Mesogog out once and for all.

Despite this ordeal, Dr. Mercer fortunately survived the whole ordeal, and was thankful to the Rangers (especially Tommy) at the series' end.


"It's demented. I love it."
―Mesogog after hearing Elsa's plan.

Mesogog (while mostly calm) is a villainous, cruel, cynical, sadistic, sinister, cold-blooded, psychopathic, monstrous, and ruthless terrorist that will do anything in his power to ensure his dream of bringing the Earth back into the age of the dinosaurs. Mesogog is also highly authoritative and aggressive, as Elsa and Zeltrax fear him, enough to obey any order from him and try not to incur his wrath. He is also very abusive, oppressive, and merciless towards his minions, and punishes them by telepathically attacking them, if they fail him. Mesogog hates the Power Rangers and will stop at nothing to destroy them. Despite his villainous tendencies, he also has a mature, polite, and sophisticated side, although his politeness seems more like hatred and abuse on his victims. Along with his sophisticated side, he has a very deadpan, cynical, and charmingly sarcastic sense of humor, making jokes or snide comments about other people whenever he feels like it.

Mesogog is a very intelligent, manipulative, deceptive, and knowledgeable mastermind, and can create very advanced technology and use them for his own benefits. He is also shown to be quite devious and is an excellent master manipulator that can influence people all too well if he knows their weaknesses. He is also very confident, later heightened to arrogance, egomania, and narcissism, all of which were ironically his main weaknesses which led to his defeat with the Dino Rangers.

As the Mesomonster, he's far more destructive, monstrous, and violent. Having lost nearly every bit of sense in this form, he doesn't talk, only speaking in growling noises, laughs, and roars.

Powers And Abilities

First Form

  • Ultra Strength: As the absolute antagonist in Dino Thunder, Mesogog is stronger than any monster or villain in the entire season. In the final part of the two-part team up episode "Thunder Storm", during his Battle with Lothor, Mesogog demonstrated immense physical strength, since he was able to easily lift Lothor over his head and toss him a very far distance.
  • Durability: Mesogog has thick skin that is quite durable, as shown the final part of the two-part team up episode "Thunder Storm", during his battle with Lothor where Lothor's Energy Laser attack had no effect on him. However, his most impressive display of power was when he survived the destruction of his own Island Fortress despite being right in the middle of it.
  • Expert Hand to Hand Combatant: While Mesogog tends to rely more on his psionic abilities, he exceptionally lethal in hand to hand combat. This is best demonstrated when he was able to match Lothor, a master Ninja capable of easily defeating several martial arts masters, in a fight that ultimately ended with him as the victor. 
  • Laser Vision: Mesogog's main ability. From his eyes he can fire a clear yellow energy laser that can inflect massive pain on the opponent's head. This was powerful enough to pull Zeltrax, Elsa, and Pollinator into the Island Fortress despite them being on the beach outside of Reefside.
  • Forehead Psionic Beam: By focusing energy, Mesogog can fire a psionic beam from his forehead.
  • Energy Absorption: Mesogog can absorb energy from the Dino Gems in order to transform into his second form.
    • Mutation-Upon absorbing all of the Dino Gem energy, Mesogog can mutate into his ultimate form at will.


  • Claws: Whilst being the only main villain to lack a weapon, Mesogog has razor sharp claws to use in order to fight his enemies.
  • The Hydro Regenerator: Mesogog operates a rain cloud system known as the Hydro Regenerator which can grow monsters with its rain.

Second Form

Mesomonster Full Body.png

  • Ultra Strength: Having all of the Dino Gems energy, he has become one of the strongest opponents the Dino Thunder Rangers have faced in terms of strength, since he was powerful enough to best all five Dino Thunder Rangers in the final battle.
  • Durability: Mesogog was nearly more invincible, as shown by the fact that he could take multiple hits from the Rangers and get blasted by Conner's Triassic Battlizer and not even get a scratch.
  • Mouth Lightning Bolts: Mesogog could fire powerful blue lightning bolts from his mouth.
  • Self-Duplication: Mesogog has the ability to make multiple copies of himself.
  • Tongue Lash: Mesogog could stretch his tongue to great lengths to grab the other Rangers.


  • Claws: Mesogog retains his claws for combat.
  • Thick Tail: Mesogog can use his newly equipped thick tail to whip and bash his foes quite effectively.

Video game appearances

Power Rangers Dino Thunder (GBA)

Mesogog is the main villain in the GBA version of Power Rangers Dino Thunder.

Power Rangers Legacy Wars

Mesogog as seen in Power Rangers Legacy Wars.

Mesogog is among the villains who feature in Power Rangers Legacy Wars.

Behind The Scenes



  • After separating from Anton Mercer, Mesogog's voice loses its lower pitch, becoming more of a hissing sound.
  • Mesogog has no Super Sentai counterpart. The main villain of Bakuryuu Sentai Abaranger is Wicked Life God Dezumozorlya, whose various mobile forms were used differently in the season as monsters of the week (save for one).
    • Dezumozorlya's Dezumolijewel form was used for Fridgia in the episode Drawn into Danger.  
    • Dezumozorlya's Dezumovoorla form was used for Ugly Monster in the episode A Test of Trust.  
    • Dezumozorlya's Dezumogevirus form was used for Zelzord in the second part of Thunder Struck.  
    • Dezumozorlya's Armored Wicked Life Soldier form was used for the second, powered up form of Zeltrax since the episode The Passion of Connor.  
    • However, just like Dezumozorlya, he occasionally tortured his minions for their failures, but the difference is, Dezumozorlya does this by electrocuting his minions with green-colored lightning blasts from his hands when possesssing Messenger of Dawn Lije, while Mesogog was able to do this without needing the help of a host.  
  • Messogog might be one of the most powerful villains in the season, being able to overwhelm all the Dino Rangers on every encounter and was able to defeat another very powerful main villain (Lothor) without breaking a sweat.
  • Mesogog is similar to Mr. Hyde from The Strange Case of Dr Jekyll and Mr Hyde. Anton Mercer, like Dr. Jekyll, invented a potion which turned him into a monster. Mercer is also similar to Dr. Curt Connors from Spider-Man, who becomes the Lizard after inventing a potion with lizard DNA to regenerate his lost right arm.
  • As Anton Mercer, his relationship with his son is similar to Norman Osborn (from Marvel's Spider-Man), aka the Green Goblin's relationship with Harry Osborn, only the difference is that Osborn becomes more monstrous and unsympathetic as time goes by, whether with his double personality or as himself. His relationship with his son did not go well either. With Mercer, he ends up cured, and remained a good man outside his double personality.
    • Perhaps another more appropriate comparison in Spider-Man would be with Curt Connors, aka the Lizard, as they are both ambitious yet well-intentioned scientists who have made a scientific breakthrough, but was mutated and corrupted as a result of said science. They also have good human selves yet have bad monster sides, as well as are related to some form of reptile. They also have tragic pasts and care deeply about their family and tries their hardest not to lose their humanity, though there are many instances where he starts to lose his humanity.
  • His Mesomonster form looks similar to SpaceGodzilla, one of Godzilla's most powerful enemies, as both have large crystal spikes sticking out of their shoulders.
  • To date Mesogog is the only Power Rangers villain to both battle and permanently defeat not kill a previous Main antagonist.
  • Mesogog's goal of reverting Earth back to the age of the dinosaurs shares a similar plot with the Doctor Who story/serial Invasion of the Dinosaurs.


Main article: List of Mesogog's appearances

See Also


Power nav icon.png Power Rangers Dino Thunder Icon-dt.png
Conner McKnight - Ethan James - Kira Ford - Tommy Oliver - Trent Fernandez-Mercer
Dino Gems - Dino Morpher - Brachio Morpher - Drago Morpher - Triassic Morpher - Triassic Battlizer Morpher - Thundermax Saber - Tyranno Staff - Tricera Shield - Ptera Grips - Brachio Staff - Drago Sword - Z-Rex Blaster - Super Dino Mode - Shield of Triumph - Triassic Battlizer - Raptor Riders - Raptor Cycles - Dino ATVs - Hovercraft Cycle - Triceramax Command Center Truck
Hayley Ziktor - Ninja Rangers - Sensei Kanoi Watanabe - S.P.D. Rangers - Cassidy Cornell - Devin Del Valle - Anton Mercer
Zords and Megazords
Tyrannozord - Tricerazord - Pterazord - Brachiozord - Dragozord - Stegozord - Cephalazord - Dimetrozord - Parasaurzord - Ankylozord - Mezodon Rover
Thundersaurus Megazord - DinoStegazord - Mezodon Megazord - Triceramax Megazord - Valkasaurus Megazord
Mesogog - Elsa - Zeltrax - White Ranger Clone - Tyrannodrones - Triptoids
Evil Space Ninjas: Lothor - Izzy & Pupperazi - Zurgane - Kelzaks
"Birdbrain" - Pollinator - Donkeyvac - Demagnetron - Dysotron - Goldenrod - Scorpex - Megalador - Creature - Angor - Rojobot - Insectolite - Fossilador - Termitetron - Ka-Ching - Mad Mackerel - Copyotter - "Other World Monster" - White Terrorsaurus -Terra Assault Craft - Jupitor - Tutenhawken - Thornox - Deadwood - Horn-Rimmed Monster - Jade Gladiator - Skortch - Nosey the Clown - Squidrose - Croco D'Vile - Rumba Monkey - Rude Elf - Fridgia - Ruby Dragon - Ugly Monster
Zords: Replicantzord - Zelzord
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