Monsters featured in Power Rangers Operation Overdrive

• Agrios [631–633]
  #631 - Home and Away, #632 - Home and Away II, #633 - Way Back When
• Benglo [617–619, 621, 623–628, 630–633]
  #617 - Man of Mercury, #618 - Man of Mercury II, #619 - Behind the Scenes, #621 - It’s Hammer Time, #623 - One Gets Away, #624 - Once a Ranger, #625 - Once a Ranger II, #626 - One Fine Day, #627 - Ronny on Empty, #628 - Ronny on Empty II, #630 - Red Ranger Unplugged, #631 - Home and Away, #632 - Home and Away II, #633 - Way Back When
• Big Mouth Monster [612, 633]
  #612 - Both Sides Now, #633 - Way Back When
• Blothgaar [622]
  #622 - Out of Luck
• Bombardo [610, 633]
  #610 - Pirate in Pink, #633 - Way Back When
• Bullox [615–616]
  #615 - Face to Face, #616 - Face to Face II
• “Camera Monster” [614]
  #614 - Lights, Camera, Dax
• Cheetar [617–618]
  #617 - Man of Mercury, #618 - Man of Mercury II
• Chillers [605, 607–608, 613, 615, 618–621, 624–625, 627, 630–631, 633, 635–636]
  #605 - Kick into Overdrive, #607 - The Underwater World, #608 - Heart of Blue, #613 - Follow the Ranger, #615 - Face to Face, #618 - Man of Mercury II, #619 - Behind the Scenes, #620 - Just Like Me, #621 - It’s Hammer Time, #624 - Once a Ranger, #625 - Once a Ranger II, #627 - Ronny on Empty, #630 - Red Ranger Unplugged, #631 - Home and Away, #633 - Way Back When, #635 - Nothing to Lose, #636 - Crown and Punishment
• Crazar [630, 632]
  #630 - Red Ranger Unplugged, #632 - Home and Away II
• “Cybernetic Rex” [627–628]
  #627 - Ronny on Empty, #628 - Ronny on Empty II
• Datum [629]
  #629 - Things Not Said
• Dragonizer [613]
  #613 - Follow the Ranger
• “Fearcats’s Machine” [631, 633]
  #631 - Home and Away, #633 - Way Back When
• “Fearcats’s Robot” [621]
  #621 - It’s Hammer Time
• “Fearcats’s Robot Mark II” [623, 633]
  #623 - One Gets Away, #633 - Way Back When
• “Fearcats’s Robot Mark III” [626]
  #626 - One Fine Day
• Flurious [605–609, 613, 615–621, 623–628, 630–632, 634–636]
  #605 - Kick into Overdrive, #606 - Kick into Overdrive II, #607 - The Underwater World, #608 - Heart of Blue, #609 - Weather or Not, #613 - Follow the Ranger, #615 - Face to Face, #616 - Face to Face II, #617 - Man of Mercury, #618 - Man of Mercury II, #619 - Behind the Scenes, #620 - Just Like Me, #621 - It’s Hammer Time, #623 - One Gets Away, #624 - Once a Ranger, #625 - Once a Ranger II, #626 - One Fine Day, #627 - Ronny on Empty, #628 - Ronny on Empty II, #630 - Red Ranger Unplugged, #631 - Home and Away, #632 - Home and Away II, #634 - Two Fallen Foes, #635 - Nothing to Lose, #636 - Crown and Punishment
• “Flurious’s Robot” [619, 633]
  #619 - Behind the Scenes, #633 - Way Back When
• Flurrex [636]
  #636 - Crown and Punishment
• “Garbage Warrior” [629]
  #629 - Things Not Said
• Generalissimo [624]
  #624 - Once a Ranger
• Giant Sea Monster [606]
  #606 - Kick into Overdrive II
• “Golem Warrior” [629]
  #629 - Things Not Said
• Kamdor [608, 610, 612, 614, 617, 619, 621, 623–625, 628–629, 631–634]
  #608 - Heart of Blue, #610 - Pirate in Pink, #612 - Both Sides Now, #614 - Lights, Camera, Dax, #617 - Man of Mercury, #619 - Behind the Scenes, #621 - It’s Hammer Time, #623 - One Gets Away, #624 - Once a Ranger, #625 - Once a Ranger II, #628 - Ronny on Empty II, #629 - Things Not Said, #631 - Home and Away, #632 - Home and Away II, #633 - Way Back When, #634 - Two Fallen Foes
• Lava Lizards [605–606, 609, 611, 613–616, 620–625, 627–628, 631, 633, 635]
  #605 - Kick into Overdrive, #606 - Kick into Overdrive II, #609 - Weather or Not, #611 - At All Cost, #613 - Follow the Ranger, #614 - Lights, Camera, Dax, #615 - Face to Face, #616 - Face to Face II, #620 - Just Like Me, #621 - It’s Hammer Time, #622 - Out of Luck, #623 - One Gets Away, #624 - Once a Ranger, #625 - Once a Ranger II, #627 - Ronny on Empty, #628 - Ronny on Empty II, #631 - Home and Away, #633 - Way Back When, #635 - Nothing to Lose
• Lavadactyls [615–616, 627, 633]
  #615 - Face to Face, #616 - Face to Face II, #627 - Ronny on Empty, #633 - Way Back When
• Magmador [635]
  #635 - Nothing to Lose
• Mig [616–619, 621, 623–628, 630–633]
  #616 - Face to Face II, #617 - Man of Mercury, #618 - Man of Mercury II, #619 - Behind the Scenes, #621 - It’s Hammer Time, #623 - One Gets Away, #624 - Once a Ranger, #625 - Once a Ranger II, #626 - One Fine Day, #627 - Ronny on Empty, #628 - Ronny on Empty II, #630 - Red Ranger Unplugged, #631 - Home and Away, #632 - Home and Away II, #633 - Way Back When
• Miratrix [608, 610, 612, 614, 617, 619, 621, 623–625, 627–629, 631–634]
  #608 - Heart of Blue, #610 - Pirate in Pink, #612 - Both Sides Now, #614 - Lights, Camera, Dax, #617 - Man of Mercury, #619 - Behind the Scenes, #621 - It’s Hammer Time, #623 - One Gets Away, #624 - Once a Ranger, #625 - Once a Ranger II, #627 - Ronny on Empty, #628 - Ronny on Empty II, #629 - Things Not Said, #631 - Home and Away, #632 - Home and Away II, #633 - Way Back When, #634 - Two Fallen Foes
• Miratrix Monster [634]
  #634 - Two Fallen Foes
• Moltor [605–607, 609, 611, 613–616, 620–625, 627–628, 631–635]
  #605 - Kick into Overdrive, #606 - Kick into Overdrive II, #607 - The Underwater World, #609 - Weather or Not, #611 - At All Cost, #613 - Follow the Ranger, #614 - Lights, Camera, Dax, #615 - Face to Face, #616 - Face to Face II, #620 - Just Like Me, #621 - It’s Hammer Time, #622 - Out of Luck, #623 - One Gets Away, #624 - Once a Ranger, #625 - Once a Ranger II, #627 - Ronny on Empty, #628 - Ronny on Empty II, #631 - Home and Away, #632 - Home and Away II, #633 - Way Back When, #634 - Two Fallen Foes, #635 - Nothing to Lose
• Moltorzord [613]
  #613 - Follow the Ranger
• “Prince Warrior” [629]
  #629 - Things Not Said
• Skeltex [614]
  #614 - Lights, Camera, Dax
• “Speaker Monster” [614]
  #614 - Lights, Camera, Dax
• “Stone Warrior” [629, 633]
  #629 - Things Not Said, #633 - Way Back When
• Temple Monster [607]
  #607 - The Underwater World
• Thrax [624–625]
  #624 - Once a Ranger, #625 - Once a Ranger II
• Top Hat [621]
  #621 - It’s Hammer Time
• Ultrog [608, 633]
  #608 - Heart of Blue, #633 - Way Back When
• Vulcon [611]
  #611 - At All Cost
• Vulturus [624–625]
  #624 - Once a Ranger, #625 - Once a Ranger II
• Vulturus Maximus [625]
  #625 - Once a Ranger II
• Weather Monster [609]
  #609 - Weather or Not
• “Winged Warrior” [629]
  #629 - Things Not Said

Total: 46 monsters