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- Machina (see Queen Machina, Machine Empire)
- Mack Hartford (see Mack Hartford, Operation Overdrive Power Rangers)
- Madison Rocca (see Mystic Force Power Rangers)
- Magma (see Villains in Power Rangers Mystic Force)
- Magna Defender
- Magnificence (see Omni, Villains in Power Rangers: S.P.D.)
- Maligore (see Villains in Power Rangers Turbo)
- Mama D. (see Villains in Power Rangers Turbo)
- Mandilok (see Villains in Power Rangers: Wild Force)
- Marah
- Marina (see Minor characters of Power Rangers)
- Master (see Master Vile, Villains in Mighty Morphin Power Rangers, see Master Org, Villains in Power Rangers: Wild Force, see The Master, Villains in Power Rangers Mystic Force, see the Pai Zhuq Masters, Allies in Power Rangers: Jungle Fury, or see Master Xandred, Villains in Power Rangers Samurai)
- Master Finn (see the Pai Zhuq Masters, Allies in Power Rangers: Jungle Fury)
- Master Guin (see the Pai Zhuq Masters, Allies in Power Rangers: Jungle Fury)
- Master Lope (see the Pai Zhuq Masters, Allies in Power Rangers: Jungle Fury)
- Master Mao (see the Pai Zhuq Masters, Allies in Power Rangers: Jungle Fury)
- Master Org (see Villains in Power Rangers: Wild Force)
- Master Phant (see the Pai Zhuq Masters, Allies in Power Rangers: Jungle Fury)
- Master Rilla (see the Pai Zhuq Masters, Allies in Power Rangers: Jungle Fury)
- Master Swoop (see the Pai Zhuq Masters, Allies in Power Rangers: Jungle Fury)
- Master Vile (see Villains in Mighty Morphin Power Rangers)
- Master Xandred (see Villains in Power Rangers Samurai)
- Matoombo (see Villains in Power Rangers Mystic Force)
- Max Cooper (see Wild Force Power Rangers)
- Maya (see Galaxy Power Rangers)
- Megahorn (see Villains in Power Rangers Mystic Force)
- Mentor Ji (see Allies in Power Rangers Samurai)
- Merrick Baliton
- Mesogog (see Villains in Power Rangers Dino Thunder)
- Mia Watanabe
- Mig (see Villains in Power Rangers Operation Overdrive)
- Mike (see Power Rangers Samurai)
- Mike Corbett
- Mira (see Miratrix, Villains in Power Rangers Operation Overdrive)
- Miratrix (see Villains in Power Rangers Operation Overdrive)
- Mirloc (see List of Criminals in Power Rangers S.P.D.)
- Miss Alicia (see Wild West Rangers, Minor characters of Power Rangers)
- Moltor (see Villains in Power Rangers Operation Overdrive)
- Mondo (see King Mondo, Machine Empire or Mondo the Magician, List of Mighty Morphin Power Rangers monsters (Season Two))
- Mora (see Mora/Morgana, Villains in Power Rangers: S.P.D.)
- Mordant (see Villains in Mighty Morphin Power Rangers)
- Morgana (see Mora/Morgana, Villains in Power Rangers: S.P.D.)
- Morticon (see Villains in Power Rangers Mystic Force)
- Motodrone (see Villains in Power Rangers Ninja Storm)
- Mr. A. Collins (see Allies in Power Rangers Time Force)
- Ms. Appleby (see Minor characters of Power Rangers)
- Mutiny (see Captain Mutiny, Villains in Power Rangers Lost Galaxy)
- Mystic Mother (see Allies in Power Rangers: Mystic Force)
Read more about this topic: List Of Power Rangers Characters